text: module.exports = function(hljs) {
    var VARIABLE = {
      begin: '\\$+[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*'
    };
    var PREPROCESSOR = {
      className: 'meta', begin: /<\?(php)?|\?>/
    };
    var STRING = {
      className: 'string',
      contains: [hljs.BACKSLASH_ESCAPE, PREPROCESSOR],
      variants: [
        {
          begin: 'b"', end: '"'
        },
        {
          begin: 'b\'', end: '\''
        },
        hljs.inherit(hljs.APOS_STRING_MODE, {illegal: null}),
        hljs.inherit(hljs.QUOTE_STRING_MODE, {illegal: null})
      ]
    };
    var NUMBER = {variants: [hljs.BINARY_NUMBER_MODE, hljs.C_NUMBER_MODE]};
    return {
      aliases: ['php', 'php3', 'php4', 'php5', 'php6', 'php7'],
      case_insensitive: true,
      keywords:
        'and include_once list abstract global private echo interface as static endswitch ' +
        'array null if endwhile or const for endforeach self var while isset public ' +
        'protected exit foreach throw elseif include __FILE__ empty require_once do xor ' +
        'return parent clone use __CLASS__ __LINE__ else break print eval new ' +
        'catch __METHOD__ case exception default die require __FUNCTION__ ' +
        'enddeclare final try switch continue endfor endif declare unset true false ' +
        'trait goto instanceof insteadof __DIR__ __NAMESPACE__ ' +
        'yield finally',
      contains: [
        hljs.HASH_COMMENT_MODE,
        hljs.COMMENT('//', '$', {contains: [PREPROCESSOR]}),
        hljs.COMMENT(
          '/\\*',
          '\\*/',
          {
            contains: [
              {
                className: 'doctag',
                begin: '@[A-Za-z]+'
              }
            ]
          }
        ),
        hljs.COMMENT(
          '__halt_compiler.+?;',
          false,
          {
            endsWithParent: true,
            keywords: '__halt_compiler',
            lexemes: hljs.UNDERSCORE_IDENT_RE
          }
        ),
        {
          className: 'string',
          begin: /<<<['"]?\w+['"]?$/, end: /^\w+;?$/,
          contains: [
            hljs.BACKSLASH_ESCAPE,
            {
              className: 'subst',
              variants: [
                {begin: /\$\w+/},
                {begin: /\{\$/, end: /\}/}
              ]
            }
          ]
        },
        PREPROCESSOR,
        {
          className: 'keyword', begin: /\$this\b/
        },
        VARIABLE,
        {
          // swallow composed identifiers to avoid parsing them as keywords
          begin: /(::|->)+[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*/
        },
        {
          className: 'function',
          beginKeywords: 'function', end: /[;{]/, excludeEnd: true,
          illegal: '\\$|\\[|%',
          contains: [
            hljs.UNDERSCORE_TITLE_MODE,
            {
              className: 'params',
              begin: '\\(', end: '\\)',
              contains: [
                'self',
                VARIABLE,
                hljs.C_BLOCK_COMMENT_MODE,
                STRING,
                NUMBER
              ]
            }
          ]
        },
        {
          className: 'class',
          beginKeywords: 'class interface', end: '{', excludeEnd: true,
          illegal: /[:\(\$"]/,
          contains: [
            {beginKeywords: 'extends implements'},
            hljs.UNDERSCORE_TITLE_MODE
          ]
        },
        {
          beginKeywords: 'namespace', end: ';',
          illegal: /[\.']/,
          contains: [hljs.UNDERSCORE_TITLE_MODE]
        },
        {
          beginKeywords: 'use', end: ';',
          contains: [hljs.UNDERSCORE_TITLE_MODE]
        },
        {
          begin: '=>' // No markup, just a relevance booster
        },
        STRING,
        NUMBER
      ]
    };
  };