wp-includes/post.php:3712Checks a MIME-Type against a list.
$wildcard_mime_typesstring|string[]$real_mime_typesstring|string[]arrayfunction 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 ( ! str_contains( $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 ] ) || ! in_array( $real, $matches[ $type ], true ) ) ) { $matches[ $type ][] = $real; } } } } return $matches;}Introduced in 2.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/post.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.