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wp_match_mime_types( string|array $wildcard_mime_types, string|array $real_mime_types )

Check a MIME-Type against a list.

Description

If the wildcard_mime_types parameter is a string, it must be comma separated list. If the real_mime_types is a string, it is also comma separated to create the list.

Parameters

$wildcard_mime_types

(string|array) (Required) Mime types, e.g. audio/mpeg or image (same as image/*) or flash (same as *flash*).

$real_mime_types

(string|array) (Required) Real post mime type values.

Return

(array) array(wildcard=>array(real types)).

Source

File: wp-includes/post.php 

function wp_match_mime_types( $wildcard_mime_types, $real_mime_types ) {
	$matches = array();
	if ( is_string( $wildcard_mime_types ) ) {
		$wildcard_mime_types = array_map( 'trim', explode( ',', $wildcard_mime_types ) );
	}
	if ( is_string( $real_mime_types ) ) {
		$real_mime_types = array_map( 'trim', explode( ',', $real_mime_types ) );
	}

	$patternses = array();
	$wild       = '[-._a-z0-9]*';

	foreach ( (array) $wildcard_mime_types as $type ) {
		$mimes = array_map( 'trim', explode( ',', $type ) );
		foreach ( $mimes as $mime ) {
			$regex = str_replace( '__wildcard__', $wild, preg_quote( str_replace( '*', '__wildcard__', $mime ) ) );

			$patternses[][ $type ] = "^$regex$";

			if ( false === strpos( $mime, '/' ) ) {
				$patternses[][ $type ] = "^$regex/";
				$patternses[][ $type ] = $regex;
			}
		}
	}
	asort( $patternses );

	foreach ( $patternses as $patterns ) {
		foreach ( $patterns as $type => $pattern ) {
			foreach ( (array) $real_mime_types as $real ) {
				if ( preg_match( "#$pattern#", $real )
					&& ( empty( $matches[ $type ] ) || false === array_search( $real, $matches[ $type ], true ) )
				) {
					$matches[ $type ][] = $real;
				}
			}
		}
	}

	return $matches;
}

Used By

Used By Description
wp-admin/includes/media.php: media_upload_library_form()

Outputs the legacy media upload form for the media library.
wp-admin/includes/media.php: get_media_item()

Retrieve HTML form for modifying the image attachment.
wp-admin/includes/ajax-actions.php: wp_ajax_upload_attachment()

Ajax handler for uploading attachments
wp-admin/includes/class-wp-media-list-table.php: WP_Media_List_Table::get_views()
wp-admin/includes/class-custom-image-header.php: Custom_Image_Header::step_2_manage_upload()

Upload the file to be cropped in the second step.
wp-admin/includes/class-custom-background.php: Custom_Background::handle_upload()

Handle an Image upload for the background image.
wp-includes/post.php: wp_mime_type_icon()

Retrieve the icon for a MIME type or attachment.

Changelog

Version Description
2.5.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/wp_match_mime_types