<?php
/**
 * WordPress environment setup class.
 *
 * @package WordPress
 * @since 2.0.0
 */
class WP {
	/**
	 * Public query variables.
	 *
	 * Long list of public query variables.
	 *
	 * @since 2.0.0
	 * @var string[]
	 */
	public $public_query_vars = array( 'm', 'p', 'posts', 'w', 'cat', 'withcomments', 'withoutcomments', 's', 'search', 'exact', 'sentence', 'calendar', 'page', 'paged', 'more', 'tb', 'pb', 'author', 'order', 'orderby', 'year', 'monthnum', 'day', 'hour', 'minute', 'second', 'name', 'category_name', 'tag', 'feed', 'author_name', 'pagename', 'page_id', 'error', 'attachment', 'attachment_id', 'subpost', 'subpost_id', 'preview', 'robots', 'favicon', 'taxonomy', 'term', 'cpage', 'post_type', 'embed' );

	/**
	 * Private query variables.
	 *
	 * Long list of private query variables.
	 *
	 * @since 2.0.0
	 * @var string[]
	 */
	public $private_query_vars = array( 'offset', 'posts_per_page', 'posts_per_archive_page', 'showposts', 'nopaging', 'post_type', 'post_status', 'category__in', 'category__not_in', 'category__and', 'tag__in', 'tag__not_in', 'tag__and', 'tag_slug__in', 'tag_slug__and', 'tag_id', 'post_mime_type', 'perm', 'comments_per_page', 'post__in', 'post__not_in', 'post_parent', 'post_parent__in', 'post_parent__not_in', 'title', 'fields' );

	/**
	 * Extra query variables set by the user.
	 *
	 * @since 2.1.0
	 * @var array
	 */
	public $extra_query_vars = array();

	/**
	 * Query variables for setting up the WordPress Query Loop.
	 *
	 * @since 2.0.0
	 * @var array
	 */
	public $query_vars;

	/**
	 * String parsed to set the query variables.
	 *
	 * @since 2.0.0
	 * @var string
	 */
	public $query_string;

	/**
	 * The request path, e.g. 2015/05/06.
	 *
	 * @since 2.0.0
	 * @var string
	 */
	public $request;

	/**
	 * Rewrite rule the request matched.
	 *
	 * @since 2.0.0
	 * @var string
	 */
	public $matched_rule;

	/**
	 * Rewrite query the request matched.
	 *
	 * @since 2.0.0
	 * @var string
	 */
	public $matched_query;

	/**
	 * Whether already did the permalink.
	 *
	 * @since 2.0.0
	 * @var bool
	 */
	public $did_permalink = false;

	/**
	 * Add name to list of public query variables.
	 *
	 * @since 2.1.0
	 *
	 * @param string $qv Query variable name.
	 */
	public function add_query_var( $qv ) {
		if ( ! in_array( $qv, $this->public_query_vars, true ) ) {
			$this->public_query_vars[] = $qv;
		}
	}

	/**
	 * Removes a query variable from a list of public query variables.
	 *
	 * @since 4.5.0
	 *
	 * @param string $name Query variable name.
	 */
	public function remove_query_var( $name ) {
		$this->public_query_vars = array_diff( $this->public_query_vars, array( $name ) );
	}

	/**
	 * Set the value of a query variable.
	 *
	 * @since 2.3.0
	 *
	 * @param string $key   Query variable name.
	 * @param mixed  $value Query variable value.
	 */
	public function set_query_var( $key, $value ) {
		$this->query_vars[ $key ] = $value;
	}

	/**
	 * Parse request to find correct WordPress query.
	 *
	 * Sets up the query variables based on the request. There are also many
	 * filters and actions that can be used to further manipulate the result.
	 *
	 * @since 2.0.0
	 *
	 * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
	 *
	 * @param array|string $extra_query_vars Set the extra query variables.
	 */
	public function parse_request( $extra_query_vars = '' ) {
		global $wp_rewrite;

		/**
		 * Filters whether to parse the request.
		 *
		 * @since 3.5.0
		 *
		 * @param bool         $bool             Whether or not to parse the request. Default true.
		 * @param WP           $this             Current WordPress environment instance.
		 * @param array|string $extra_query_vars Extra passed query variables.
		 */
		if ( ! apply_filters( 'do_parse_request', true, $this, $extra_query_vars ) ) {
			return;
		}

		$this->query_vars     = array();
		$post_type_query_vars = array();

		if ( is_array( $extra_query_vars ) ) {
			$this->extra_query_vars = & $extra_query_vars;
		} elseif ( ! empty( $extra_query_vars ) ) {
			parse_str( $extra_query_vars, $this->extra_query_vars );
		}
		// Process PATH_INFO, REQUEST_URI, and 404 for permalinks.

		// Fetch the rewrite rules.
		$rewrite = $wp_rewrite->wp_rewrite_rules();

		if ( ! empty( $rewrite ) ) {
			// If we match a rewrite rule, this will be cleared.
			$error               = '404';
			$this->did_permalink = true;

			$pathinfo         = isset( $_SERVER['PATH_INFO'] ) ? $_SERVER['PATH_INFO'] : '';
			list( $pathinfo ) = explode( '?', $pathinfo );
			$pathinfo         = str_replace( '%', '%25', $pathinfo );

			list( $req_uri ) = explode( '?', $_SERVER['REQUEST_URI'] );
			$self            = $_SERVER['PHP_SELF'];
			$home_path       = trim( parse_url( home_url(), PHP_URL_PATH ), '/' );
			$home_path_regex = sprintf( '|^%s|i', preg_quote( $home_path, '|' ) );

			/*
			 * Trim path info from the end and the leading home path from the front.
			 * For path info requests, this leaves us with the requesting filename, if any.
			 * For 404 requests, this leaves us with the requested permalink.
			 */
			$req_uri  = str_replace( $pathinfo, '', $req_uri );
			$req_uri  = trim( $req_uri, '/' );
			$req_uri  = preg_replace( $home_path_regex, '', $req_uri );
			$req_uri  = trim( $req_uri, '/' );
			$pathinfo = trim( $pathinfo, '/' );
			$pathinfo = preg_replace( $home_path_regex, '', $pathinfo );
			$pathinfo = trim( $pathinfo, '/' );
			$self     = trim( $self, '/' );
			$self     = preg_replace( $home_path_regex, '', $self );
			$self     = trim( $self, '/' );

			// The requested permalink is in $pathinfo for path info requests and
			// $req_uri for other requests.
			if ( ! empty( $pathinfo ) && ! preg_match( '|^.*' . $wp_rewrite->index . '$|', $pathinfo ) ) {
				$requested_path = $pathinfo;
			} else {
				// If the request uri is the index, blank it out so that we don't try to match it against a rule.
				if ( $req_uri == $wp_rewrite->index ) {
					$req_uri = '';
				}
				$requested_path = $req_uri;
			}
			$requested_file = $req_uri;

			$this->request = $requested_path;

			// Look for matches.
			$request_match = $requested_path;
			if ( empty( $request_match ) ) {
				// An empty request could only match against ^$ regex.
				if ( isset( $rewrite['$'] ) ) {
					$this->matched_rule = '$';
					$query              = $rewrite['$'];
					$matches            = array( '' );
				}
			} else {
				foreach ( (array) $rewrite as $match => $query ) {
					// If the requested file is the anchor of the match, prepend it to the path info.
					if ( ! empty( $requested_file ) && strpos( $match, $requested_file ) === 0 && $requested_file != $requested_path ) {
						$request_match = $requested_file . '/' . $requested_path;
					}

					if ( preg_match( "#^$match#", $request_match, $matches ) ||
						preg_match( "#^$match#", urldecode( $request_match ), $matches ) ) {

						if ( $wp_rewrite->use_verbose_page_rules && preg_match( '/pagename=\$matches\[([0-9]+)\]/', $query, $varmatch ) ) {
							// This is a verbose page match, let's check to be sure about it.
							$page = get_page_by_path( $matches[ $varmatch[1] ] );
							if ( ! $page ) {
								continue;
							}

							$post_status_obj = get_post_status_object( $page->post_status );
							if ( ! $post_status_obj->public && ! $post_status_obj->protected
								&& ! $post_status_obj->private && $post_status_obj->exclude_from_search ) {
								continue;
							}
						}

						// Got a match.
						$this->matched_rule = $match;
						break;
					}
				}
			}

			if ( isset( $this->matched_rule ) ) {
				// Trim the query of everything up to the '?'.
				$query = preg_replace( '!^.+\?!', '', $query );

				// Substitute the substring matches into the query.
				$query = addslashes( WP_MatchesMapRegex::apply( $query, $matches ) );

				$this->matched_query = $query;

				// Parse the query.
				parse_str( $query, $perma_query_vars );

				// If we're processing a 404 request, clear the error var since we found something.
				if ( '404' == $error ) {
					unset( $error, $_GET['error'] );
				}
			}

			// If req_uri is empty or if it is a request for ourself, unset error.
			if ( empty( $requested_path ) || $requested_file == $self || strpos( $_SERVER['PHP_SELF'], 'wp-admin/' ) !== false ) {
				unset( $error, $_GET['error'] );

				if ( isset( $perma_query_vars ) && strpos( $_SERVER['PHP_SELF'], 'wp-admin/' ) !== false ) {
					unset( $perma_query_vars );
				}

				$this->did_permalink = false;
			}
		}

		/**
		 * Filters the query variables allowed before processing.
		 *
		 * Allows (publicly allowed) query vars to be added, removed, or changed prior
		 * to executing the query. Needed to allow custom rewrite rules using your own arguments
		 * to work, or any other custom query variables you want to be publicly available.
		 *
		 * @since 1.5.0
		 *
		 * @param string[] $public_query_vars The array of allowed query variable names.
		 */
		$this->public_query_vars = apply_filters( 'query_vars', $this->public_query_vars );

		foreach ( get_post_types( array(), 'objects' ) as $post_type => $t ) {
			if ( is_post_type_viewable( $t ) && $t->query_var ) {
				$post_type_query_vars[ $t->query_var ] = $post_type;
			}
		}

		foreach ( $this->public_query_vars as $wpvar ) {
			if ( isset( $this->extra_query_vars[ $wpvar ] ) ) {
				$this->query_vars[ $wpvar ] = $this->extra_query_vars[ $wpvar ];
			} elseif ( isset( $_GET[ $wpvar ] ) && isset( $_POST[ $wpvar ] ) && $_GET[ $wpvar ] !== $_POST[ $wpvar ] ) {
				wp_die( __( 'A variable mismatch has been detected.' ), __( 'Sorry, you are not allowed to view this item.' ), 400 );
			} elseif ( isset( $_POST[ $wpvar ] ) ) {
				$this->query_vars[ $wpvar ] = $_POST[ $wpvar ];
			} elseif ( isset( $_GET[ $wpvar ] ) ) {
				$this->query_vars[ $wpvar ] = $_GET[ $wpvar ];
			} elseif ( isset( $perma_query_vars[ $wpvar ] ) ) {
				$this->query_vars[ $wpvar ] = $perma_query_vars[ $wpvar ];
			}

			if ( ! empty( $this->query_vars[ $wpvar ] ) ) {
				if ( ! is_array( $this->query_vars[ $wpvar ] ) ) {
					$this->query_vars[ $wpvar ] = (string) $this->query_vars[ $wpvar ];
				} else {
					foreach ( $this->query_vars[ $wpvar ] as $vkey => $v ) {
						if ( is_scalar( $v ) ) {
							$this->query_vars[ $wpvar ][ $vkey ] = (string) $v;
						}
					}
				}

				if ( isset( $post_type_query_vars[ $wpvar ] ) ) {
					$this->query_vars['post_type'] = $post_type_query_vars[ $wpvar ];
					$this->query_vars['name']      = $this->query_vars[ $wpvar ];
				}
			}
		}

		// Convert urldecoded spaces back into '+'.
		foreach ( get_taxonomies( array(), 'objects' ) as $taxonomy => $t ) {
			if ( $t->query_var && isset( $this->query_vars[ $t->query_var ] ) ) {
				$this->query_vars[ $t->query_var ] = str_replace( ' ', '+', $this->query_vars[ $t->query_var ] );
			}
		}

		// Don't allow non-publicly queryable taxonomies to be queried from the front end.
		if ( ! is_admin() ) {
			foreach ( get_taxonomies( array( 'publicly_queryable' => false ), 'objects' ) as $taxonomy => $t ) {
				/*
				 * Disallow when set to the 'taxonomy' query var.
				 * Non-publicly queryable taxonomies cannot register custom query vars. See register_taxonomy().
				 */
				if ( isset( $this->query_vars['taxonomy'] ) && $taxonomy === $this->query_vars['taxonomy'] ) {
					unset( $this->query_vars['taxonomy'], $this->query_vars['term'] );
				}
			}
		}

		// Limit publicly queried post_types to those that are 'publicly_queryable'.
		if ( isset( $this->query_vars['post_type'] ) ) {
			$queryable_post_types = get_post_types( array( 'publicly_queryable' => true ) );
			if ( ! is_array( $this->query_vars['post_type'] ) ) {
				if ( ! in_array( $this->query_vars['post_type'], $queryable_post_types, true ) ) {
					unset( $this->query_vars['post_type'] );
				}
			} else {
				$this->query_vars['post_type'] = array_intersect( $this->query_vars['post_type'], $queryable_post_types );
			}
		}

		// Resolve conflicts between posts with numeric slugs and date archive queries.
		$this->query_vars = wp_resolve_numeric_slug_conflicts( $this->query_vars );

		foreach ( (array) $this->private_query_vars as $var ) {
			if ( isset( $this->extra_query_vars[ $var ] ) ) {
				$this->query_vars[ $var ] = $this->extra_query_vars[ $var ];
			}
		}

		if ( isset( $error ) ) {
			$this->query_vars['error'] = $error;
		}

		/**
		 * Filters the array of parsed query variables.
		 *
		 * @since 2.1.0
		 *
		 * @param array $query_vars The array of requested query variables.
		 */
		$this->query_vars = apply_filters( 'request', $this->query_vars );

		/**
		 * Fires once all query variables for the current request have been parsed.
		 *
		 * @since 2.1.0
		 *
		 * @param WP $this Current WordPress environment instance (passed by reference).
		 */
		do_action_ref_array( 'parse_request', array( &$this ) );
	}

	/**
	 * Sends additional HTTP headers for caching, content type, etc.
	 *
	 * Sets the Content-Type header. Sets the 'error' status (if passed) and optionally exits.
	 * If showing a feed, it will also send Last-Modified, ETag, and 304 status if needed.
	 *
	 * @since 2.0.0
	 * @since 4.4.0 `X-Pingback` header is added conditionally after posts have been queried in handle_404().
	 */
	public function send_headers() {
		$headers       = array();
		$status        = null;
		$exit_required = false;

		if ( is_user_logged_in() ) {
			$headers = array_merge( $headers, wp_get_nocache_headers() );
		} elseif ( ! empty( $_GET['unapproved'] ) && ! empty( $_GET['moderation-hash'] ) ) {
			// Unmoderated comments are only visible for one minute via the moderation hash.
			$headers['Expires']       = gmdate( 'D, d M Y H:i:s', time() + MINUTE_IN_SECONDS );
			$headers['Cache-Control'] = 'max-age=60, must-revalidate';
		}
		if ( ! empty( $this->query_vars['error'] ) ) {
			$status = (int) $this->query_vars['error'];
			if ( 404 === $status ) {
				if ( ! is_user_logged_in() ) {
					$headers = array_merge( $headers, wp_get_nocache_headers() );
				}
				$headers['Content-Type'] = get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' );
			} elseif ( in_array( $status, array( 403, 500, 502, 503 ), true ) ) {
				$exit_required = true;
			}
		} elseif ( empty( $this->query_vars['feed'] ) ) {
			$headers['Content-Type'] = get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' );
		} else {
			// Set the correct content type for feeds.
			$type = $this->query_vars['feed'];
			if ( 'feed' === $this->query_vars['feed'] ) {
				$type = get_default_feed();
			}
			$headers['Content-Type'] = feed_content_type( $type ) . '; charset=' . get_option( 'blog_charset' );

			// We're showing a feed, so WP is indeed the only thing that last changed.
			if ( ! empty( $this->query_vars['withcomments'] )
				|| false !== strpos( $this->query_vars['feed'], 'comments-' )
				|| ( empty( $this->query_vars['withoutcomments'] )
					&& ( ! empty( $this->query_vars['p'] )
						|| ! empty( $this->query_vars['name'] )
						|| ! empty( $this->query_vars['page_id'] )
						|| ! empty( $this->query_vars['pagename'] )
						|| ! empty( $this->query_vars['attachment'] )
						|| ! empty( $this->query_vars['attachment_id'] )
					)
				)
			) {
				$wp_last_modified = mysql2date( 'D, d M Y H:i:s', get_lastcommentmodified( 'GMT' ), false );
			} else {
				$wp_last_modified = mysql2date( 'D, d M Y H:i:s', get_lastpostmodified( 'GMT' ), false );
			}

			if ( ! $wp_last_modified ) {
				$wp_last_modified = gmdate( 'D, d M Y H:i:s' );
			}

			$wp_last_modified .= ' GMT';

			$wp_etag                  = '"' . md5( $wp_last_modified ) . '"';
			$headers['Last-Modified'] = $wp_last_modified;
			$headers['ETag']          = $wp_etag;

			// Support for conditional GET.
			if ( isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) ) {
				$client_etag = wp_unslash( $_SERVER['HTTP_IF_NONE_MATCH'] );
			} else {
				$client_etag = false;
			}

			$client_last_modified = empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ? '' : trim( $_SERVER['HTTP_IF_MODIFIED_SINCE'] );
			// If string is empty, return 0. If not, attempt to parse into a timestamp.
			$client_modified_timestamp = $client_last_modified ? strtotime( $client_last_modified ) : 0;

			// Make a timestamp for our most recent modification..
			$wp_modified_timestamp = strtotime( $wp_last_modified );

			if ( ( $client_last_modified && $client_etag ) ?
					( ( $client_modified_timestamp >= $wp_modified_timestamp ) && ( $client_etag == $wp_etag ) ) :
					( ( $client_modified_timestamp >= $wp_modified_timestamp ) || ( $client_etag == $wp_etag ) ) ) {
				$status        = 304;
				$exit_required = true;
			}
		}

		/**
		 * Filters the HTTP headers before they're sent to the browser.
		 *
		 * @since 2.8.0
		 *
		 * @param string[] $headers Associative array of headers to be sent.
		 * @param WP       $this    Current WordPress environment instance.
		 */
		$headers = apply_filters( 'wp_headers', $headers, $this );

		if ( ! empty( $status ) ) {
			status_header( $status );
		}

		// If Last-Modified is set to false, it should not be sent (no-cache situation).
		if ( isset( $headers['Last-Modified'] ) && false === $headers['Last-Modified'] ) {
			unset( $headers['Last-Modified'] );

			if ( ! headers_sent() ) {
				header_remove( 'Last-Modified' );
			}
		}

		if ( ! headers_sent() ) {
			foreach ( (array) $headers as $name => $field_value ) {
				header( "{$name}: {$field_value}" );
			}
		}

		if ( $exit_required ) {
			exit;
		}

		/**
		 * Fires once the requested HTTP headers for caching, content type, etc. have been sent.
		 *
		 * @since 2.1.0
		 *
		 * @param WP $this Current WordPress environment instance (passed by reference).
		 */
		do_action_ref_array( 'send_headers', array( &$this ) );
	}

	/**
	 * Sets the query string property based off of the query variable property.
	 *
	 * The {@see 'query_string'} filter is deprecated, but still works. Plugins should
	 * use the {@see 'request'} filter instead.
	 *
	 * @since 2.0.0
	 */
	public function build_query_string() {
		$this->query_string = '';
		foreach ( (array) array_keys( $this->query_vars ) as $wpvar ) {
			if ( '' != $this->query_vars[ $wpvar ] ) {
				$this->query_string .= ( strlen( $this->query_string ) < 1 ) ? '' : '&';
				if ( ! is_scalar( $this->query_vars[ $wpvar ] ) ) { // Discard non-scalars.
					continue;
				}
				$this->query_string .= $wpvar . '=' . rawurlencode( $this->query_vars[ $wpvar ] );
			}
		}

		if ( has_filter( 'query_string' ) ) {  // Don't bother filtering and parsing if no plugins are hooked in.
			/**
			 * Filters the query string before parsing.
			 *
			 * @since 1.5.0
			 * @deprecated 2.1.0 Use {@see 'query_vars'} or {@see 'request'} filters instead.
			 *
			 * @param string $query_string The query string to modify.
			 */
			$this->query_string = apply_filters_deprecated(
				'query_string',
				array( $this->query_string ),
				'2.1.0',
				'query_vars, request'
			);
			parse_str( $this->query_string, $this->query_vars );
		}
	}

	/**
	 * Set up the WordPress Globals.
	 *
	 * The query_vars property will be extracted to the GLOBALS. So care should
	 * be taken when naming global variables that might interfere with the
	 * WordPress environment.
	 *
	 * @since 2.0.0
	 *
	 * @global WP_Query     $wp_query     WordPress Query object.
	 * @global string       $query_string Query string for the loop.
	 * @global array        $posts        The found posts.
	 * @global WP_Post|null $post         The current post, if available.
	 * @global string       $request      The SQL statement for the request.
	 * @global int          $more         Only set, if single page or post.
	 * @global int          $single       If single page or post. Only set, if single page or post.
	 * @global WP_User      $authordata   Only set, if author archive.
	 */
	public function register_globals() {
		global $wp_query;

		// Extract updated query vars back into global namespace.
		foreach ( (array) $wp_query->query_vars as $key => $value ) {
			$GLOBALS[ $key ] = $value;
		}

		$GLOBALS['query_string'] = $this->query_string;
		$GLOBALS['posts']        = & $wp_query->posts;
		$GLOBALS['post']         = isset( $wp_query->post ) ? $wp_query->post : null;
		$GLOBALS['request']      = $wp_query->request;

		if ( $wp_query->is_single() || $wp_query->is_page() ) {
			$GLOBALS['more']   = 1;
			$GLOBALS['single'] = 1;
		}

		if ( $wp_query->is_author() && isset( $wp_query->post ) ) {
			$GLOBALS['authordata'] = get_userdata( $wp_query->post->post_author );
		}
	}

	/**
	 * Set up the current user.
	 *
	 * @since 2.0.0
	 */
	public function init() {
		wp_get_current_user();
	}

	/**
	 * Set up the Loop based on the query variables.
	 *
	 * @since 2.0.0
	 *
	 * @global WP_Query $wp_the_query WordPress Query object.
	 */
	public function query_posts() {
		global $wp_the_query;
		$this->build_query_string();
		$wp_the_query->query( $this->query_vars );
	}

	/**
	 * Set the Headers for 404, if nothing is found for requested URL.
	 *
	 * Issue a 404 if a request doesn't match any posts and doesn't match any object
	 * (e.g. an existing-but-empty category, tag, author) and a 404 was not already issued,
	 * and if the request was not a search or the homepage.
	 *
	 * Otherwise, issue a 200.
	 *
	 * This sets headers after posts have been queried. handle_404() really means "handle status".
	 * By inspecting the result of querying posts, seemingly successful requests can be switched to
	 * a 404 so that canonical redirection logic can kick in.
	 *
	 * @since 2.0.0
	 *
	 * @global WP_Query $wp_query WordPress Query object.
	 */
	public function handle_404() {
		global $wp_query;

		/**
		 * Filters whether to short-circuit default header status handling.
		 *
		 * Returning a non-false value from the filter will short-circuit the handling
		 * and return early.
		 *
		 * @since 4.5.0
		 *
		 * @param bool     $preempt  Whether to short-circuit default header status handling. Default false.
		 * @param WP_Query $wp_query WordPress Query object.
		 */
		if ( false !== apply_filters( 'pre_handle_404', false, $wp_query ) ) {
			return;
		}

		// If we've already issued a 404, bail.
		if ( is_404() ) {
			return;
		}

		$set_404 = true;

		// Never 404 for the admin, robots, or favicon.
		if ( is_admin() || is_robots() || is_favicon() ) {
			$set_404 = false;

			// If posts were found, check for paged content.
		} elseif ( $wp_query->posts ) {
			$content_found = true;

			if ( is_singular() ) {
				$post = isset( $wp_query->post ) ? $wp_query->post : null;

				// Only set X-Pingback for single posts that allow pings.
				if ( $post && pings_open( $post ) && ! headers_sent() ) {
					header( 'X-Pingback: ' . get_bloginfo( 'pingback_url', 'display' ) );
				}

				// Check for paged content that exceeds the max number of pages.
				$next = '<!--nextpage-->';
				if ( $post && ! empty( $this->query_vars['page'] ) ) {
					// Check if content is actually intended to be paged.
					if ( false !== strpos( $post->post_content, $next ) ) {
						$page          = trim( $this->query_vars['page'], '/' );
						$content_found = (int) $page <= ( substr_count( $post->post_content, $next ) + 1 );
					} else {
						$content_found = false;
					}
				}
			}

			// The posts page does not support the <!--nextpage--> pagination.
			if ( $wp_query->is_posts_page && ! empty( $this->query_vars['page'] ) ) {
				$content_found = false;
			}

			if ( $content_found ) {
				$set_404 = false;
			}

			// We will 404 for paged queries, as no posts were found.
		} elseif ( ! is_paged() ) {
			$author = get_query_var( 'author' );

			// Don't 404 for authors without posts as long as they matched an author on this site.
			if ( is_author() && is_numeric( $author ) && $author > 0 && is_user_member_of_blog( $author )
				// Don't 404 for these queries if they matched an object.
				|| ( is_tag() || is_category() || is_tax() || is_post_type_archive() ) && get_queried_object()
				// Don't 404 for these queries either.
				|| is_home() || is_search() || is_feed()
			) {
				$set_404 = false;
			}
		}

		if ( $set_404 ) {
			// Guess it's time to 404.
			$wp_query->set_404();
			status_header( 404 );
			nocache_headers();
		} else {
			status_header( 200 );
		}
	}

	/**
	 * Sets up all of the variables required by the WordPress environment.
	 *
	 * The action {@see 'wp'} has one parameter that references the WP object. It
	 * allows for accessing the properties and methods to further manipulate the
	 * object.
	 *
	 * @since 2.0.0
	 *
	 * @param string|array $query_args Passed to parse_request().
	 */
	public function main( $query_args = '' ) {
		$this->init();
		$this->parse_request( $query_args );
		$this->send_headers();
		$this->query_posts();
		$this->handle_404();
		$this->register_globals();

		/**
		 * Fires once the WordPress environment has been set up.
		 *
		 * @since 2.1.0
		 *
		 * @param WP $this Current WordPress environment instance (passed by reference).
		 */
		do_action_ref_array( 'wp', array( &$this ) );
	}
}


<?php
/**
 * Dependencies API: WP_Dependencies base class
 *
 * @since 2.6.0
 *
 * @package WordPress
 * @subpackage Dependencies
 */

/**
 * Core base class extended to register items.
 *
 * @since 2.6.0
 *
 * @see _WP_Dependency
 */
class WP_Dependencies {
	/**
	 * An array of registered handle objects.
	 *
	 * @since 2.6.8
	 * @var array
	 */
	public $registered = array();

	/**
	 * An array of handles of queued objects.
	 *
	 * @since 2.6.8
	 * @var string[]
	 */
	public $queue = array();

	/**
	 * An array of handles of objects to queue.
	 *
	 * @since 2.6.0
	 * @var string[]
	 */
	public $to_do = array();

	/**
	 * An array of handles of objects already queued.
	 *
	 * @since 2.6.0
	 * @var string[]
	 */
	public $done = array();

	/**
	 * An array of additional arguments passed when a handle is registered.
	 *
	 * Arguments are appended to the item query string.
	 *
	 * @since 2.6.0
	 * @var array
	 */
	public $args = array();

	/**
	 * An array of handle groups to enqueue.
	 *
	 * @since 2.8.0
	 * @var array
	 */
	public $groups = array();

	/**
	 * A handle group to enqueue.
	 *
	 * @since 2.8.0
	 * @deprecated 4.5.0
	 * @var int
	 */
	public $group = 0;

	/**
	 * Cached lookup array of flattened queued items and dependencies.
	 *
	 * @since 5.4.0
	 * @var array
	 */
	private $all_queued_deps;

	/**
	 * Processes the items and dependencies.
	 *
	 * Processes the items passed to it or the queue, and their dependencies.
	 *
	 * @since 2.6.0
	 * @since 2.8.0 Added the `$group` parameter.
	 *
	 * @param string|string[]|false $handles Optional. Items to be processed: queue (false),
	 *                                       single item (string), or multiple items (array of strings).
	 *                                       Default false.
	 * @param int|false             $group   Optional. Group level: level (int), no groups (false).
	 * @return string[] Array of handles of items that have been processed.
	 */
	public function do_items( $handles = false, $group = false ) {
		/*
		 * If nothing is passed, print the queue. If a string is passed,
		 * print that item. If an array is passed, print those items.
		 */
		$handles = false === $handles ? $this->queue : (array) $handles;
		$this->all_deps( $handles );

		foreach ( $this->to_do as $key => $handle ) {
			if ( ! in_array( $handle, $this->done, true ) && isset( $this->registered[ $handle ] ) ) {
				/*
				 * Attempt to process the item. If successful,
				 * add the handle to the done array.
				 *
				 * Unset the item from the to_do array.
				 */
				if ( $this->do_item( $handle, $group ) ) {
					$this->done[] = $handle;
				}

				unset( $this->to_do[ $key ] );
			}
		}

		return $this->done;
	}

	/**
	 * Processes a dependency.
	 *
	 * @since 2.6.0
	 * @since 5.5.0 Added the `$group` parameter.
	 *
	 * @param string    $handle Name of the item. Should be unique.
	 * @param int|false $group  Optional. Group level: level (int), no groups (false).
	 *                          Default false.
	 * @return bool True on success, false if not set.
	 */
	public function do_item( $handle, $group = false ) {
		return isset( $this->registered[ $handle ] );
	}

	/**
	 * Determines dependencies.
	 *
	 * Recursively builds an array of items to process taking
	 * dependencies into account. Does NOT catch infinite loops.
	 *
	 * @since 2.1.0
	 * @since 2.6.0 Moved from `WP_Scripts`.
	 * @since 2.8.0 Added the `$group` parameter.
	 *
	 * @param string|string[] $handles   Item handle (string) or item handles (array of strings).
	 * @param bool            $recursion Optional. Internal flag that function is calling itself.
	 *                                   Default false.
	 * @param int|false       $group     Optional. Group level: level (int), no groups (false).
	 *                                   Default false.
	 * @return bool True on success, false on failure.
	 */
	public function all_deps( $handles, $recursion = false, $group = false ) {
		$handles = (array) $handles;
		if ( ! $handles ) {
			return false;
		}

		foreach ( $handles as $handle ) {
			$handle_parts = explode( '?', $handle );
			$handle       = $handle_parts[0];
			$queued       = in_array( $handle, $this->to_do, true );

			if ( in_array( $handle, $this->done, true ) ) { // Already done.
				continue;
			}

			$moved     = $this->set_group( $handle, $recursion, $group );
			$new_group = $this->groups[ $handle ];

			if ( $queued && ! $moved ) { // Already queued and in the right group.
				continue;
			}

			$keep_going = true;
			if ( ! isset( $this->registered[ $handle ] ) ) {
				$keep_going = false; // Item doesn't exist.
			} elseif ( $this->registered[ $handle ]->deps && array_diff( $this->registered[ $handle ]->deps, array_keys( $this->registered ) ) ) {
				$keep_going = false; // Item requires dependencies that don't exist.
			} elseif ( $this->registered[ $handle ]->deps && ! $this->all_deps( $this->registered[ $handle ]->deps, true, $new_group ) ) {
				$keep_going = false; // Item requires dependencies that don't exist.
			}

			if ( ! $keep_going ) { // Either item or its dependencies don't exist.
				if ( $recursion ) {
					return false; // Abort this branch.
				} else {
					continue; // We're at the top level. Move on to the next one.
				}
			}

			if ( $queued ) { // Already grabbed it and its dependencies.
				continue;
			}

			if ( isset( $handle_parts[1] ) ) {
				$this->args[ $handle ] = $handle_parts[1];
			}

			$this->to_do[] = $handle;
		}

		return true;
	}

	/**
	 * Register an item.
	 *
	 * Registers the item if no item of that name already exists.
	 *
	 * @since 2.1.0
	 * @since 2.6.0 Moved from `WP_Scripts`.
	 *
	 * @param string           $handle Name of the item. Should be unique.
	 * @param string|bool      $src    Full URL of the item, or path of the item relative
	 *                                 to the WordPress root directory. If source is set to false,
	 *                                 item is an alias of other items it depends on.
	 * @param string[]         $deps   Optional. An array of registered item handles this item depends on.
	 *                                 Default empty array.
	 * @param string|bool|null $ver    Optional. String specifying item version number, if it has one,
	 *                                 which is added to the URL as a query string for cache busting purposes.
	 *                                 If version is set to false, a version number is automatically added
	 *                                 equal to current installed WordPress version.
	 *                                 If set to null, no version is added.
	 * @param mixed            $args   Optional. Custom property of the item. NOT the class property $args.
	 *                                 Examples: $media, $in_footer.
	 * @return bool Whether the item has been registered. True on success, false on failure.
	 */
	public function add( $handle, $src, $deps = array(), $ver = false, $args = null ) {
		if ( isset( $this->registered[ $handle ] ) ) {
			return false;
		}
		$this->registered[ $handle ] = new _WP_Dependency( $handle, $src, $deps, $ver, $args );
		return true;
	}

	/**
	 * Add extra item data.
	 *
	 * Adds data to a registered item.
	 *
	 * @since 2.6.0
	 *
	 * @param string $handle Name of the item. Should be unique.
	 * @param string $key    The data key.
	 * @param mixed  $value  The data value.
	 * @return bool True on success, false on failure.
	 */
	public function add_data( $handle, $key, $value ) {
		if ( ! isset( $this->registered[ $handle ] ) ) {
			return false;
		}

		return $this->registered[ $handle ]->add_data( $key, $value );
	}

	/**
	 * Get extra item data.
	 *
	 * Gets data associated with a registered item.
	 *
	 * @since 3.3.0
	 *
	 * @param string $handle Name of the item. Should be unique.
	 * @param string $key    The data key.
	 * @return mixed Extra item data (string), false otherwise.
	 */
	public function get_data( $handle, $key ) {
		if ( ! isset( $this->registered[ $handle ] ) ) {
			return false;
		}

		if ( ! isset( $this->registered[ $handle ]->extra[ $key ] ) ) {
			return false;
		}

		return $this->registered[ $handle ]->extra[ $key ];
	}

	/**
	 * Un-register an item or items.
	 *
	 * @since 2.1.0
	 * @since 2.6.0 Moved from `WP_Scripts`.
	 *
	 * @param string|string[] $handles Item handle (string) or item handles (array of strings).
	 */
	public function remove( $handles ) {
		foreach ( (array) $handles as $handle ) {
			unset( $this->registered[ $handle ] );
		}
	}

	/**
	 * Queue an item or items.
	 *
	 * Decodes handles and arguments, then queues handles and stores
	 * arguments in the class property $args. For example in extending
	 * classes, $args is appended to the item url as a query string.
	 * Note $args is NOT the $args property of items in the $registered array.
	 *
	 * @since 2.1.0
	 * @since 2.6.0 Moved from `WP_Scripts`.
	 *
	 * @param string|string[] $handles Item handle (string) or item handles (array of strings).
	 */
	public function enqueue( $handles ) {
		foreach ( (array) $handles as $handle ) {
			$handle = explode( '?', $handle );

			if ( ! in_array( $handle[0], $this->queue, true ) && isset( $this->registered[ $handle[0] ] ) ) {
				$this->queue[] = $handle[0];

				// Reset all dependencies so they must be recalculated in recurse_deps().
				$this->all_queued_deps = null;

				if ( isset( $handle[1] ) ) {
					$this->args[ $handle[0] ] = $handle[1];
				}
			}
		}
	}

	/**
	 * Dequeue an item or items.
	 *
	 * Decodes handles and arguments, then dequeues handles
	 * and removes arguments from the class property $args.
	 *
	 * @since 2.1.0
	 * @since 2.6.0 Moved from `WP_Scripts`.
	 *
	 * @param string|string[] $handles Item handle (string) or item handles (array of strings).
	 */
	public function dequeue( $handles ) {
		foreach ( (array) $handles as $handle ) {
			$handle = explode( '?', $handle );
			$key    = array_search( $handle[0], $this->queue, true );

			if ( false !== $key ) {
				// Reset all dependencies so they must be recalculated in recurse_deps().
				$this->all_queued_deps = null;

				unset( $this->queue[ $key ] );
				unset( $this->args[ $handle[0] ] );
			}
		}
	}

	/**
	 * Recursively search the passed dependency tree for $handle.
	 *
	 * @since 4.0.0
	 *
	 * @param string[] $queue  An array of queued _WP_Dependency handles.
	 * @param string   $handle Name of the item. Should be unique.
	 * @return bool Whether the handle is found after recursively searching the dependency tree.
	 */
	protected function recurse_deps( $queue, $handle ) {
		if ( isset( $this->all_queued_deps ) ) {
			return isset( $this->all_queued_deps[ $handle ] );
		}

		$all_deps = array_fill_keys( $queue, true );
		$queues   = array();
		$done     = array();

		while ( $queue ) {
			foreach ( $queue as $queued ) {
				if ( ! isset( $done[ $queued ] ) && isset( $this->registered[ $queued ] ) ) {
					$deps = $this->registered[ $queued ]->deps;
					if ( $deps ) {
						$all_deps += array_fill_keys( $deps, true );
						array_push( $queues, $deps );
					}
					$done[ $queued ] = true;
				}
			}
			$queue = array_pop( $queues );
		}

		$this->all_queued_deps = $all_deps;

		return isset( $this->all_queued_deps[ $handle ] );
	}

	/**
	 * Query list for an item.
	 *
	 * @since 2.1.0
	 * @since 2.6.0 Moved from `WP_Scripts`.
	 *
	 * @param string $handle Name of the item. Should be unique.
	 * @param string $list   Optional. Property name of list array. Default 'registered'.
	 * @return bool|_WP_Dependency Found, or object Item data.
	 */
	public function query( $handle, $list = 'registered' ) {
		switch ( $list ) {
			case 'registered':
			case 'scripts': // Back compat.
				if ( isset( $this->registered[ $handle ] ) ) {
					return $this->registered[ $handle ];
				}
				return false;

			case 'enqueued':
			case 'queue':
				if ( in_array( $handle, $this->queue, true ) ) {
					return true;
				}
				return $this->recurse_deps( $this->queue, $handle );

			case 'to_do':
			case 'to_print': // Back compat.
				return in_array( $handle, $this->to_do, true );

			case 'done':
			case 'printed': // Back compat.
				return in_array( $handle, $this->done, true );
		}
		return false;
	}

	/**
	 * Set item group, unless already in a lower group.
	 *
	 * @since 2.8.0
	 *
	 * @param string    $handle    Name of the item. Should be unique.
	 * @param bool      $recursion Internal flag that calling function was called recursively.
	 * @param int|false $group     Group level: level (int), no groups (false).
	 * @return bool Not already in the group or a lower group.
	 */
	public function set_group( $handle, $recursion, $group ) {
		$group = (int) $group;

		if ( isset( $this->groups[ $handle ] ) && $this->groups[ $handle ] <= $group ) {
			return false;
		}

		$this->groups[ $handle ] = $group;

		return true;
	}

}


<?php
/**
 * Dependencies API: WP_Scripts class
 *
 * @since 2.6.0
 *
 * @package WordPress
 * @subpackage Dependencies
 */

/**
 * Core class used to register scripts.
 *
 * @since 2.1.0
 *
 * @see WP_Dependencies
 */
class WP_Scripts extends WP_Dependencies {
	/**
	 * Base URL for scripts.
	 *
	 * Full URL with trailing slash.
	 *
	 * @since 2.6.0
	 * @var string
	 */
	public $base_url;

	/**
	 * URL of the content directory.
	 *
	 * @since 2.8.0
	 * @var string
	 */
	public $content_url;

	/**
	 * Default version string for scripts.
	 *
	 * @since 2.6.0
	 * @var string
	 */
	public $default_version;

	/**
	 * Holds handles of scripts which are enqueued in footer.
	 *
	 * @since 2.8.0
	 * @var array
	 */
	public $in_footer = array();

	/**
	 * Holds a list of script handles which will be concatenated.
	 *
	 * @since 2.8.0
	 * @var string
	 */
	public $concat = '';

	/**
	 * Holds a string which contains script handles and their version.
	 *
	 * @since 2.8.0
	 * @deprecated 3.4.0
	 * @var string
	 */
	public $concat_version = '';

	/**
	 * Whether to perform concatenation.
	 *
	 * @since 2.8.0
	 * @var bool
	 */
	public $do_concat = false;

	/**
	 * Holds HTML markup of scripts and additional data if concatenation
	 * is enabled.
	 *
	 * @since 2.8.0
	 * @var string
	 */
	public $print_html = '';

	/**
	 * Holds inline code if concatenation is enabled.
	 *
	 * @since 2.8.0
	 * @var string
	 */
	public $print_code = '';

	/**
	 * Holds a list of script handles which are not in the default directory
	 * if concatenation is enabled.
	 *
	 * Unused in core.
	 *
	 * @since 2.8.0
	 * @var string
	 */
	public $ext_handles = '';

	/**
	 * Holds a string which contains handles and versions of scripts which
	 * are not in the default directory if concatenation is enabled.
	 *
	 * Unused in core.
	 *
	 * @since 2.8.0
	 * @var string
	 */
	public $ext_version = '';

	/**
	 * List of default directories.
	 *
	 * @since 2.8.0
	 * @var array
	 */
	public $default_dirs;

	/**
	 * Holds a string which contains the type attribute for script tag.
	 *
	 * If the current theme does not declare HTML5 support for 'script',
	 * then it initializes as `type='text/javascript'`.
	 *
	 * @since 5.3.0
	 * @var string
	 */
	private $type_attr = '';

	/**
	 * Constructor.
	 *
	 * @since 2.6.0
	 */
	public function __construct() {
		$this->init();
		add_action( 'init', array( $this, 'init' ), 0 );
	}

	/**
	 * Initialize the class.
	 *
	 * @since 3.4.0
	 */
	public function init() {
		if (
			function_exists( 'is_admin' ) && ! is_admin()
		&&
			function_exists( 'current_theme_supports' ) && ! current_theme_supports( 'html5', 'script' )
		) {
			$this->type_attr = " type='text/javascript'";
		}

		/**
		 * Fires when the WP_Scripts instance is initialized.
		 *
		 * @since 2.6.0
		 *
		 * @param WP_Scripts $this WP_Scripts instance (passed by reference).
		 */
		do_action_ref_array( 'wp_default_scripts', array( &$this ) );
	}

	/**
	 * Prints scripts.
	 *
	 * Prints the scripts passed to it or the print queue. Also prints all necessary dependencies.
	 *
	 * @since 2.1.0
	 * @since 2.8.0 Added the `$group` parameter.
	 *
	 * @param string|string[]|false $handles Optional. Scripts to be printed: queue (false),
	 *                                       single script (string), or multiple scripts (array of strings).
	 *                                       Default false.
	 * @param int|false             $group   Optional. Group level: level (int), no groups (false).
	 *                                       Default false.
	 * @return string[] Handles of scripts that have been printed.
	 */
	public function print_scripts( $handles = false, $group = false ) {
		return $this->do_items( $handles, $group );
	}

	/**
	 * Prints extra scripts of a registered script.
	 *
	 * @since 2.1.0
	 * @since 2.8.0 Added the `$echo` parameter.
	 * @deprecated 3.3.0
	 *
	 * @see print_extra_script()
	 *
	 * @param string $handle The script's registered handle.
	 * @param bool   $echo   Optional. Whether to echo the extra script
	 *                       instead of just returning it. Default true.
	 * @return bool|string|void Void if no data exists, extra scripts if `$echo` is true,
	 *                          true otherwise.
	 */
	public function print_scripts_l10n( $handle, $echo = true ) {
		_deprecated_function( __FUNCTION__, '3.3.0', 'WP_Scripts::print_extra_script()' );
		return $this->print_extra_script( $handle, $echo );
	}

	/**
	 * Prints extra scripts of a registered script.
	 *
	 * @since 3.3.0
	 *
	 * @param string $handle The script's registered handle.
	 * @param bool   $echo   Optional. Whether to echo the extra script
	 *                       instead of just returning it. Default true.
	 * @return bool|string|void Void if no data exists, extra scripts if `$echo` is true,
	 *                          true otherwise.
	 */
	public function print_extra_script( $handle, $echo = true ) {
		$output = $this->get_data( $handle, 'data' );
		if ( ! $output ) {
			return;
		}

		if ( ! $echo ) {
			return $output;
		}

		printf( "<script%s id='%s-js-extra'>\n", $this->type_attr, esc_attr( $handle ) );

		// CDATA is not needed for HTML 5.
		if ( $this->type_attr ) {
			echo "/* <![CDATA[ */\n";
		}

		echo "$output\n";

		if ( $this->type_attr ) {
			echo "/* ]]> */\n";
		}

		echo "</script>\n";

		return true;
	}

	/**
	 * Processes a script dependency.
	 *
	 * @since 2.6.0
	 * @since 2.8.0 Added the `$group` parameter.
	 *
	 * @see WP_Dependencies::do_item()
	 *
	 * @param string    $handle The script's registered handle.
	 * @param int|false $group  Optional. Group level: level (int), no groups (false).
	 *                          Default false.
	 * @return bool True on success, false on failure.
	 */
	public function do_item( $handle, $group = false ) {
		if ( ! parent::do_item( $handle ) ) {
			return false;
		}

		if ( 0 === $group && $this->groups[ $handle ] > 0 ) {
			$this->in_footer[] = $handle;
			return false;
		}

		if ( false === $group && in_array( $handle, $this->in_footer, true ) ) {
			$this->in_footer = array_diff( $this->in_footer, (array) $handle );
		}

		$obj = $this->registered[ $handle ];

		if ( null === $obj->ver ) {
			$ver = '';
		} else {
			$ver = $obj->ver ? $obj->ver : $this->default_version;
		}

		if ( isset( $this->args[ $handle ] ) ) {
			$ver = $ver ? $ver . '&' . $this->args[ $handle ] : $this->args[ $handle ];
		}

		$src         = $obj->src;
		$cond_before = '';
		$cond_after  = '';
		$conditional = isset( $obj->extra['conditional'] ) ? $obj->extra['conditional'] : '';

		if ( $conditional ) {
			$cond_before = "<!--[if {$conditional}]>\n";
			$cond_after  = "<![endif]-->\n";
		}

		$before_handle = $this->print_inline_script( $handle, 'before', false );
		$after_handle  = $this->print_inline_script( $handle, 'after', false );

		if ( $before_handle ) {
			$before_handle = sprintf( "<script%s id='%s-js-before'>\n%s\n</script>\n", $this->type_attr, esc_attr( $handle ), $before_handle );
		}

		if ( $after_handle ) {
			$after_handle = sprintf( "<script%s id='%s-js-after'>\n%s\n</script>\n", $this->type_attr, esc_attr( $handle ), $after_handle );
		}

		if ( $before_handle || $after_handle ) {
			$inline_script_tag = $cond_before . $before_handle . $after_handle . $cond_after;
		} else {
			$inline_script_tag = '';
		}

		$translations = $this->print_translations( $handle, false );
		if ( $translations ) {
			$translations = sprintf( "<script%s id='%s-js-translations'>\n%s\n</script>\n", $this->type_attr, esc_attr( $handle ), $translations );
		}

		if ( $this->do_concat ) {
			/**
			 * Filters the script loader source.
			 *
			 * @since 2.2.0
			 *
			 * @param string $src    Script loader source path.
			 * @param string $handle Script handle.
			 */
			$srce = apply_filters( 'script_loader_src', $src, $handle );

			if ( $this->in_default_dir( $srce ) && ( $before_handle || $after_handle || $translations ) ) {
				$this->do_concat = false;

				// Have to print the so-far concatenated scripts right away to maintain the right order.
				_print_scripts();
				$this->reset();
			} elseif ( $this->in_default_dir( $srce ) && ! $conditional ) {
				$this->print_code     .= $this->print_extra_script( $handle, false );
				$this->concat         .= "$handle,";
				$this->concat_version .= "$handle$ver";
				return true;
			} else {
				$this->ext_handles .= "$handle,";
				$this->ext_version .= "$handle$ver";
			}
		}

		$has_conditional_data = $conditional && $this->get_data( $handle, 'data' );

		if ( $has_conditional_data ) {
			echo $cond_before;
		}

		$this->print_extra_script( $handle );

		if ( $has_conditional_data ) {
			echo $cond_after;
		}

		// A single item may alias a set of items, by having dependencies, but no source.
		if ( ! $src ) {
			if ( $inline_script_tag ) {
				if ( $this->do_concat ) {
					$this->print_html .= $inline_script_tag;
				} else {
					echo $inline_script_tag;
				}
			}

			return true;
		}

		if ( ! preg_match( '|^(https?:)?//|', $src ) && ! ( $this->content_url && 0 === strpos( $src, $this->content_url ) ) ) {
			$src = $this->base_url . $src;
		}

		if ( ! empty( $ver ) ) {
			$src = add_query_arg( 'ver', $ver, $src );
		}

		/** This filter is documented in wp-includes/class.wp-scripts.php */
		$src = esc_url( apply_filters( 'script_loader_src', $src, $handle ) );

		if ( ! $src ) {
			return true;
		}

		$tag  = $translations . $cond_before . $before_handle;
		$tag .= sprintf( "<script%s src='%s' id='%s-js'></script>\n", $this->type_attr, $src, esc_attr( $handle ) );
		$tag .= $after_handle . $cond_after;

		/**
		 * Filters the HTML script tag of an enqueued script.
		 *
		 * @since 4.1.0
		 *
		 * @param string $tag    The `<script>` tag for the enqueued script.
		 * @param string $handle The script's registered handle.
		 * @param string $src    The script's source URL.
		 */
		$tag = apply_filters( 'script_loader_tag', $tag, $handle, $src );

		if ( $this->do_concat ) {
			$this->print_html .= $tag;
		} else {
			echo $tag;
		}

		return true;
	}

	/**
	 * Adds extra code to a registered script.
	 *
	 * @since 4.5.0
	 *
	 * @param string $handle   Name of the script to add the inline script to.
	 *                         Must be lowercase.
	 * @param string $data     String containing the javascript to be added.
	 * @param string $position Optional. Whether to add the inline script
	 *                         before the handle or after. Default 'after'.
	 * @return bool True on success, false on failure.
	 */
	public function add_inline_script( $handle, $data, $position = 'after' ) {
		if ( ! $data ) {
			return false;
		}

		if ( 'after' !== $position ) {
			$position = 'before';
		}

		$script   = (array) $this->get_data( $handle, $position );
		$script[] = $data;

		return $this->add_data( $handle, $position, $script );
	}

	/**
	 * Prints inline scripts registered for a specific handle.
	 *
	 * @since 4.5.0
	 *
	 * @param string $handle   Name of the script to add the inline script to.
	 *                         Must be lowercase.
	 * @param string $position Optional. Whether to add the inline script
	 *                         before the handle or after. Default 'after'.
	 * @param bool   $echo     Optional. Whether to echo the script
	 *                         instead of just returning it. Default true.
	 * @return string|false Script on success, false otherwise.
	 */
	public function print_inline_script( $handle, $position = 'after', $echo = true ) {
		$output = $this->get_data( $handle, $position );

		if ( empty( $output ) ) {
			return false;
		}

		$output = trim( implode( "\n", $output ), "\n" );

		if ( $echo ) {
			printf( "<script%s id='%s-js-%s'>\n%s\n</script>\n", $this->type_attr, esc_attr( $handle ), esc_attr( $position ), $output );
		}

		return $output;
	}

	/**
	 * Localizes a script, only if the script has already been added.
	 *
	 * @since 2.1.0
	 *
	 * @param string $handle      Name of the script to attach data to.
	 * @param string $object_name Name of the variable that will contain the data.
	 * @param array  $l10n        Array of data to localize.
	 * @return bool True on success, false on failure.
	 */
	public function localize( $handle, $object_name, $l10n ) {
		if ( 'jquery' === $handle ) {
			$handle = 'jquery-core';
		}

		if ( is_array( $l10n ) && isset( $l10n['l10n_print_after'] ) ) { // back compat, preserve the code in 'l10n_print_after' if present.
			$after = $l10n['l10n_print_after'];
			unset( $l10n['l10n_print_after'] );
		}

		foreach ( (array) $l10n as $key => $value ) {
			if ( ! is_scalar( $value ) ) {
				continue;
			}

			$l10n[ $key ] = html_entity_decode( (string) $value, ENT_QUOTES, 'UTF-8' );
		}

		$script = "var $object_name = " . wp_json_encode( $l10n ) . ';';

		if ( ! empty( $after ) ) {
			$script .= "\n$after;";
		}

		$data = $this->get_data( $handle, 'data' );

		if ( ! empty( $data ) ) {
			$script = "$data\n$script";
		}

		return $this->add_data( $handle, 'data', $script );
	}

	/**
	 * Sets handle group.
	 *
	 * @since 2.8.0
	 *
	 * @see WP_Dependencies::set_group()
	 *
	 * @param string    $handle    Name of the item. Should be unique.
	 * @param bool      $recursion Internal flag that calling function was called recursively.
	 * @param int|false $group     Optional. Group level: level (int), no groups (false).
	 *                             Default false.
	 * @return bool Not already in the group or a lower group.
	 */
	public function set_group( $handle, $recursion, $group = false ) {
		if ( isset( $this->registered[ $handle ]->args ) && 1 === $this->registered[ $handle ]->args ) {
			$grp = 1;
		} else {
			$grp = (int) $this->get_data( $handle, 'group' );
		}

		if ( false !== $group && $grp > $group ) {
			$grp = $group;
		}

		return parent::set_group( $handle, $recursion, $grp );
	}

	/**
	 * Sets a translation textdomain.
	 *
	 * @since 5.0.0
	 * @since 5.1.0 The `$domain` parameter was made optional.
	 *
	 * @param string $handle Name of the script to register a translation domain to.
	 * @param string $domain Optional. Text domain. Default 'default'.
	 * @param string $path   Optional. The full file path to the directory containing translation files.
	 * @return bool True if the text domain was registered, false if not.
	 */
	public function set_translations( $handle, $domain = 'default', $path = null ) {
		if ( ! isset( $this->registered[ $handle ] ) ) {
			return false;
		}

		/** @var \_WP_Dependency $obj */
		$obj = $this->registered[ $handle ];

		if ( ! in_array( 'wp-i18n', $obj->deps, true ) ) {
			$obj->deps[] = 'wp-i18n';
		}

		return $obj->set_translations( $domain, $path );
	}

	/**
	 * Prints translations set for a specific handle.
	 *
	 * @since 5.0.0
	 *
	 * @param string $handle Name of the script to add the inline script to.
	 *                       Must be lowercase.
	 * @param bool   $echo   Optional. Whether to echo the script
	 *                       instead of just returning it. Default true.
	 * @return string|false Script on success, false otherwise.
	 */
	public function print_translations( $handle, $echo = true ) {
		if ( ! isset( $this->registered[ $handle ] ) || empty( $this->registered[ $handle ]->textdomain ) ) {
			return false;
		}

		$domain = $this->registered[ $handle ]->textdomain;
		$path   = $this->registered[ $handle ]->translations_path;

		$json_translations = load_script_textdomain( $handle, $domain, $path );

		if ( ! $json_translations ) {
			// Register empty locale data object to ensure the domain still exists.
			$json_translations = '{ "locale_data": { "messages": { "": {} } } }';
		}

		$output = <<<JS
( function( domain, translations ) {
	var localeData = translations.locale_data[ domain ] || translations.locale_data.messages;
	localeData[""].domain = domain;
	wp.i18n.setLocaleData( localeData, domain );
} )( "{$domain}", {$json_translations} );
JS;

		if ( $echo ) {
			printf( "<script%s id='%s-js-translations'>\n%s\n</script>\n", $this->type_attr, esc_attr( $handle ), $output );
		}

		return $output;
	}

	/**
	 * Determines script dependencies.
	 *
	 * @since 2.1.0
	 *
	 * @see WP_Dependencies::all_deps()
	 *
	 * @param string|string[] $handles   Item handle (string) or item handles (array of strings).
	 * @param bool            $recursion Optional. Internal flag that function is calling itself.
	 *                                   Default false.
	 * @param int|false       $group     Optional. Group level: level (int), no groups (false).
	 *                                   Default false.
	 * @return bool True on success, false on failure.
	 */
	public function all_deps( $handles, $recursion = false, $group = false ) {
		$r = parent::all_deps( $handles, $recursion, $group );
		if ( ! $recursion ) {
			/**
			 * Filters the list of script dependencies left to print.
			 *
			 * @since 2.3.0
			 *
			 * @param string[] $to_do An array of script dependency handles.
			 */
			$this->to_do = apply_filters( 'print_scripts_array', $this->to_do );
		}
		return $r;
	}

	/**
	 * Processes items and dependencies for the head group.
	 *
	 * @since 2.8.0
	 *
	 * @see WP_Dependencies::do_items()
	 *
	 * @return string[] Handles of items that have been processed.
	 */
	public function do_head_items() {
		$this->do_items( false, 0 );
		return $this->done;
	}

	/**
	 * Processes items and dependencies for the footer group.
	 *
	 * @since 2.8.0
	 *
	 * @see WP_Dependencies::do_items()
	 *
	 * @return string[] Handles of items that have been processed.
	 */
	public function do_footer_items() {
		$this->do_items( false, 1 );
		return $this->done;
	}

	/**
	 * Whether a handle's source is in a default directory.
	 *
	 * @since 2.8.0
	 *
	 * @param string $src The source of the enqueued script.
	 * @return bool True if found, false if not.
	 */
	public function in_default_dir( $src ) {
		if ( ! $this->default_dirs ) {
			return true;
		}

		if ( 0 === strpos( $src, '/' . WPINC . '/js/l10n' ) ) {
			return false;
		}

		foreach ( (array) $this->default_dirs as $test ) {
			if ( 0 === strpos( $src, $test ) ) {
				return true;
			}
		}
		return false;
	}

	/**
	 * Resets class properties.
	 *
	 * @since 2.8.0
	 */
	public function reset() {
		$this->do_concat      = false;
		$this->print_code     = '';
		$this->concat         = '';
		$this->concat_version = '';
		$this->print_html     = '';
		$this->ext_version    = '';
		$this->ext_handles    = '';
	}
}


<?php
/**
 * Dependencies API: WP_Styles class
 *
 * @since 2.6.0
 *
 * @package WordPress
 * @subpackage Dependencies
 */

/**
 * Core class used to register styles.
 *
 * @since 2.6.0
 *
 * @see WP_Dependencies
 */
class WP_Styles extends WP_Dependencies {
	/**
	 * Base URL for styles.
	 *
	 * Full URL with trailing slash.
	 *
	 * @since 2.6.0
	 * @var string
	 */
	public $base_url;

	/**
	 * URL of the content directory.
	 *
	 * @since 2.8.0
	 * @var string
	 */
	public $content_url;

	/**
	 * Default version string for stylesheets.
	 *
	 * @since 2.6.0
	 * @var string
	 */
	public $default_version;

	/**
	 * The current text direction.
	 *
	 * @since 2.6.0
	 * @var string
	 */
	public $text_direction = 'ltr';

	/**
	 * Holds a list of style handles which will be concatenated.
	 *
	 * @since 2.8.0
	 * @var string
	 */
	public $concat = '';

	/**
	 * Holds a string which contains style handles and their version.
	 *
	 * @since 2.8.0
	 * @deprecated 3.4.0
	 * @var string
	 */
	public $concat_version = '';

	/**
	 * Whether to perform concatenation.
	 *
	 * @since 2.8.0
	 * @var bool
	 */
	public $do_concat = false;

	/**
	 * Holds HTML markup of styles and additional data if concatenation
	 * is enabled.
	 *
	 * @since 2.8.0
	 * @var string
	 */
	public $print_html = '';

	/**
	 * Holds inline styles if concatenation is enabled.
	 *
	 * @since 3.3.0
	 * @var string
	 */
	public $print_code = '';

	/**
	 * List of default directories.
	 *
	 * @since 2.8.0
	 * @var array
	 */
	public $default_dirs;

	/**
	 * Holds a string which contains the type attribute for style tag.
	 *
	 * If the current theme does not declare HTML5 support for 'style',
	 * then it initializes as `type='text/css'`.
	 *
	 * @since 5.3.0
	 * @var string
	 */
	private $type_attr = '';

	/**
	 * Constructor.
	 *
	 * @since 2.6.0
	 */
	public function __construct() {
		if (
			function_exists( 'is_admin' ) && ! is_admin()
		&&
			function_exists( 'current_theme_supports' ) && ! current_theme_supports( 'html5', 'style' )
		) {
			$this->type_attr = " type='text/css'";
		}

		/**
		 * Fires when the WP_Styles instance is initialized.
		 *
		 * @since 2.6.0
		 *
		 * @param WP_Styles $this WP_Styles instance (passed by reference).
		 */
		do_action_ref_array( 'wp_default_styles', array( &$this ) );
	}

	/**
	 * Processes a style dependency.
	 *
	 * @since 2.6.0
	 * @since 5.5.0 Added the `$group` parameter.
	 *
	 * @see WP_Dependencies::do_item()
	 *
	 * @param string    $handle The style's registered handle.
	 * @param int|false $group  Optional. Group level: level (int), no groups (false).
	 *                          Default false.
	 * @return bool True on success, false on failure.
	 */
	public function do_item( $handle, $group = false ) {
		if ( ! parent::do_item( $handle ) ) {
			return false;
		}

		$obj = $this->registered[ $handle ];

		if ( null === $obj->ver ) {
			$ver = '';
		} else {
			$ver = $obj->ver ? $obj->ver : $this->default_version;
		}

		if ( isset( $this->args[ $handle ] ) ) {
			$ver = $ver ? $ver . '&' . $this->args[ $handle ] : $this->args[ $handle ];
		}

		$src         = $obj->src;
		$cond_before = '';
		$cond_after  = '';
		$conditional = isset( $obj->extra['conditional'] ) ? $obj->extra['conditional'] : '';

		if ( $conditional ) {
			$cond_before = "<!--[if {$conditional}]>\n";
			$cond_after  = "<![endif]-->\n";
		}

		$inline_style = $this->print_inline_style( $handle, false );

		if ( $inline_style ) {
			$inline_style_tag = sprintf(
				"<style id='%s-inline-css'%s>\n%s\n</style>\n",
				esc_attr( $handle ),
				$this->type_attr,
				$inline_style
			);
		} else {
			$inline_style_tag = '';
		}

		if ( $this->do_concat ) {
			if ( $this->in_default_dir( $src ) && ! $conditional && ! isset( $obj->extra['alt'] ) ) {
				$this->concat         .= "$handle,";
				$this->concat_version .= "$handle$ver";

				$this->print_code .= $inline_style;

				return true;
			}
		}

		if ( isset( $obj->args ) ) {
			$media = esc_attr( $obj->args );
		} else {
			$media = 'all';
		}

		// A single item may alias a set of items, by having dependencies, but no source.
		if ( ! $src ) {
			if ( $inline_style_tag ) {
				if ( $this->do_concat ) {
					$this->print_html .= $inline_style_tag;
				} else {
					echo $inline_style_tag;
				}
			}

			return true;
		}

		$href = $this->_css_href( $src, $ver, $handle );
		if ( ! $href ) {
			return true;
		}

		$rel   = isset( $obj->extra['alt'] ) && $obj->extra['alt'] ? 'alternate stylesheet' : 'stylesheet';
		$title = isset( $obj->extra['title'] ) ? sprintf( "title='%s'", esc_attr( $obj->extra['title'] ) ) : '';

		$tag = sprintf(
			"<link rel='%s' id='%s-css' %s href='%s'%s media='%s' />\n",
			$rel,
			$handle,
			$title,
			$href,
			$this->type_attr,
			$media
		);

		/**
		 * Filters the HTML link tag of an enqueued style.
		 *
		 * @since 2.6.0
		 * @since 4.3.0 Introduced the `$href` parameter.
		 * @since 4.5.0 Introduced the `$media` parameter.
		 *
		 * @param string $html   The link tag for the enqueued style.
		 * @param string $handle The style's registered handle.
		 * @param string $href   The stylesheet's source URL.
		 * @param string $media  The stylesheet's media attribute.
		 */
		$tag = apply_filters( 'style_loader_tag', $tag, $handle, $href, $media );

		if ( 'rtl' === $this->text_direction && isset( $obj->extra['rtl'] ) && $obj->extra['rtl'] ) {
			if ( is_bool( $obj->extra['rtl'] ) || 'replace' === $obj->extra['rtl'] ) {
				$suffix   = isset( $obj->extra['suffix'] ) ? $obj->extra['suffix'] : '';
				$rtl_href = str_replace( "{$suffix}.css", "-rtl{$suffix}.css", $this->_css_href( $src, $ver, "$handle-rtl" ) );
			} else {
				$rtl_href = $this->_css_href( $obj->extra['rtl'], $ver, "$handle-rtl" );
			}

			$rtl_tag = sprintf(
				"<link rel='%s' id='%s-rtl-css' %s href='%s'%s media='%s' />\n",
				$rel,
				$handle,
				$title,
				$rtl_href,
				$this->type_attr,
				$media
			);

			/** This filter is documented in wp-includes/class.wp-styles.php */
			$rtl_tag = apply_filters( 'style_loader_tag', $rtl_tag, $handle, $rtl_href, $media );

			if ( 'replace' === $obj->extra['rtl'] ) {
				$tag = $rtl_tag;
			} else {
				$tag .= $rtl_tag;
			}
		}

		if ( $this->do_concat ) {
			$this->print_html .= $cond_before;
			$this->print_html .= $tag;
			if ( $inline_style_tag ) {
				$this->print_html .= $inline_style_tag;
			}
			$this->print_html .= $cond_after;
		} else {
			echo $cond_before;
			echo $tag;
			$this->print_inline_style( $handle );
			echo $cond_after;
		}

		return true;
	}

	/**
	 * Adds extra CSS styles to a registered stylesheet.
	 *
	 * @since 3.3.0
	 *
	 * @param string $handle The style's registered handle.
	 * @param string $code   String containing the CSS styles to be added.
	 * @return bool True on success, false on failure.
	 */
	public function add_inline_style( $handle, $code ) {
		if ( ! $code ) {
			return false;
		}

		$after = $this->get_data( $handle, 'after' );
		if ( ! $after ) {
			$after = array();
		}

		$after[] = $code;

		return $this->add_data( $handle, 'after', $after );
	}

	/**
	 * Prints extra CSS styles of a registered stylesheet.
	 *
	 * @since 3.3.0
	 *
	 * @param string $handle The style's registered handle.
	 * @param bool   $echo   Optional. Whether to echo the inline style
	 *                       instead of just returning it. Default true.
	 * @return string|bool False if no data exists, inline styles if `$echo` is true,
	 *                     true otherwise.
	 */
	public function print_inline_style( $handle, $echo = true ) {
		$output = $this->get_data( $handle, 'after' );

		if ( empty( $output ) ) {
			return false;
		}

		$output = implode( "\n", $output );

		if ( ! $echo ) {
			return $output;
		}

		printf(
			"<style id='%s-inline-css'%s>\n%s\n</style>\n",
			esc_attr( $handle ),
			$this->type_attr,
			$output
		);

		return true;
	}

	/**
	 * Determines style dependencies.
	 *
	 * @since 2.6.0
	 *
	 * @see WP_Dependencies::all_deps()
	 *
	 * @param string|string[] $handles   Item handle (string) or item handles (array of strings).
	 * @param bool            $recursion Optional. Internal flag that function is calling itself.
	 *                                   Default false.
	 * @param int|false       $group     Optional. Group level: level (int), no groups (false).
	 *                                   Default false.
	 * @return bool True on success, false on failure.
	 */
	public function all_deps( $handles, $recursion = false, $group = false ) {
		$r = parent::all_deps( $handles, $recursion, $group );
		if ( ! $recursion ) {
			/**
			 * Filters the array of enqueued styles before processing for output.
			 *
			 * @since 2.6.0
			 *
			 * @param string[] $to_do The list of enqueued style handles about to be processed.
			 */
			$this->to_do = apply_filters( 'print_styles_array', $this->to_do );
		}
		return $r;
	}

	/**
	 * Generates an enqueued style's fully-qualified URL.
	 *
	 * @since 2.6.0
	 *
	 * @param string $src    The source of the enqueued style.
	 * @param string $ver    The version of the enqueued style.
	 * @param string $handle The style's registered handle.
	 * @return string Style's fully-qualified URL.
	 */
	public function _css_href( $src, $ver, $handle ) {
		if ( ! is_bool( $src ) && ! preg_match( '|^(https?:)?//|', $src ) && ! ( $this->content_url && 0 === strpos( $src, $this->content_url ) ) ) {
			$src = $this->base_url . $src;
		}

		if ( ! empty( $ver ) ) {
			$src = add_query_arg( 'ver', $ver, $src );
		}

		/**
		 * Filters an enqueued style's fully-qualified URL.
		 *
		 * @since 2.6.0
		 *
		 * @param string $src    The source URL of the enqueued style.
		 * @param string $handle The style's registered handle.
		 */
		$src = apply_filters( 'style_loader_src', $src, $handle );
		return esc_url( $src );
	}

	/**
	 * Whether a handle's source is in a default directory.
	 *
	 * @since 2.8.0
	 *
	 * @param string $src The source of the enqueued style.
	 * @return bool True if found, false if not.
	 */
	public function in_default_dir( $src ) {
		if ( ! $this->default_dirs ) {
			return true;
		}

		foreach ( (array) $this->default_dirs as $test ) {
			if ( 0 === strpos( $src, $test ) ) {
				return true;
			}
		}
		return false;
	}

	/**
	 * Processes items and dependencies for the footer group.
	 *
	 * HTML 5 allows styles in the body, grab late enqueued items and output them in the footer.
	 *
	 * @since 3.3.0
	 *
	 * @see WP_Dependencies::do_items()
	 *
	 * @return string[] Handles of items that have been processed.
	 */
	public function do_footer_items() {
		$this->do_items( false, 1 );
		return $this->done;
	}

	/**
	 * Resets class properties.
	 *
	 * @since 3.3.0
	 */
	public function reset() {
		$this->do_concat      = false;
		$this->concat         = '';
		$this->concat_version = '';
		$this->print_html     = '';
	}
}