udio formats.   
[ wp_get_attachment_id3_keys() ](https://developer.wordpress.org/reference/functions/wp_get_attachment_id3_keys/) ` wp-includes/media.php ` |  Returns useful keys to use to lookup data from an attachment’s stored metadata.   
[ wp_audio_shortcode() ](https://developer.wordpress.org/reference/functions/wp_audio_shortcode/) ` wp-includes/media.php ` |  Builds the Audio shortcode output.   
[ get_image_tag() ](https://developer.wordpress.org/reference/functions/get_image_tag/) ` wp-includes/media.php ` |  Gets an img tag for an image attachment, scaling it down if requested.   
[ wp_constrain_dimensions() ](https://developer.wordpress.org/reference/functions/wp_constrain_dimensions/) ` wp-includes/media.php ` |  Calculates the new dimensions for a down-sampled image.   
[ image_resize_dimensions() ](https://developer.wordpress.org/reference/functions/image_resize_dimensions/) ` wp-includes/media.php ` |  Retrieves calculated resize dimensions for use in [ WP_Image_Editor ](https://developer.wordpress.org/reference/classes/wp_image_editor/) .   
[ get_intermediate_image_sizes() ](https://developer.wordpress.org/reference/functions/get_intermediate_image_sizes/) ` wp-includes/media.php ` |  Gets the available intermediate image size names.   
[ wp_get_attachment_image_src() ](https://developer.wordpress.org/reference/functions/wp_get_attachment_image_src/) ` wp-includes/media.php ` |  Retrieves an image to represent an attachment.   
[ wp_get_attachment_image() ](https://developer.wordpress.org/reference/functions/wp_get_attachment_image/) ` wp-includes/media.php ` |  Gets an HTML img element representing an image attachment.   
[ image_get_intermediate_size() ](https://developer.wordpress.org/reference/functions/image_get_intermediate_size/) ` wp-includes/media.php ` |  Retrieves the image’s intermediate size (resized) path, width, and height.   
[ img_caption_shortcode() ](https://developer.wordpress.org/reference/functions/img_caption_shortcode/) ` wp-includes/media.php ` |  Builds the Caption shortcode output.   
[ image_constrain_size_for_editor() ](https://developer.wordpress.org/reference/functions/image_constrain_size_for_editor/) ` wp-includes/media.php ` |  Scales down the default size of an image.   
[ image_downsize() ](https://developer.wordpress.org/reference/functions/image_downsize/) ` wp-includes/media.php ` |  Scales an image to fit a particular size (such as ‘thumb’ or ‘medium’).   
[ wp_mime_type_icon() ](https://developer.wordpress.org/reference/functions/wp_mime_type_icon/) ` wp-includes/post.php ` |  Retrieves the icon for a MIME type or attachment.   
[ get_lastpostdate() ](https://developer.wordpress.org/reference/functions/get_lastpostdate/) ` wp-includes/post.php ` |  Retrieves the most recent time that a post on the site was published.   
[ get_lastpostmodified() ](https://developer.wordpress.org/reference/functions/get_lastpostmodified/) ` wp-includes/post.php ` |  Gets the most recent time that a post on the site was modified.   
[ wp_delete_attachment() ](https://developer.wordpress.org/reference/functions/wp_delete_attachment/) ` wp-includes/post.php ` |  Trashes or deletes an attachment.   
[ wp_get_attachment_metadata() ](https://developer.wordpress.org/reference/functions/wp_get_attachment_metadata/) ` wp-includes/post.php ` |  Retrieves attachment metadata for attachment ID.   
[ wp_update_attachment_metadata() ](https://developer.wordpress.org/reference/functions/wp_update_attachment_metadata/) ` wp-includes/post.php ` |  Updates metadata for an attachment.   
[ wp_get_attachment_url() ](https://developer.wordpress.org/reference/functions/wp_get_attachment_url/) ` wp-includes/post.php ` |  Retrieves the URL for an attachment.   
[ wp_get_attachment_thumb_url() ](https://developer.wordpress.org/reference/functions/wp_get_attachment_thumb_url/) ` wp-includes/post.php ` |  Retrieves URL for an attachment thumbnail.   
[ wp_get_attachment_thumb_file() ](https://developer.wordpress.o