Retrieves the file type from the file name.

You can optionally define the mime array, if needed.

$filename string Required

File name or path.

$mimes string[] Optional

Array of allowed mime types keyed by their file extension regex.

Default: null

array Values for the extension and mime type.

• extstring|false
  File extension, or false if the file doesn't match a mime type.
• typestring|false
  File mime type, or false if the file doesn't match a mime type.

File: wp-includes/functions.php. View all references

function wp_check_filetype( $filename, $mimes = null ) {
	if ( empty( $mimes ) ) {
		$mimes = get_allowed_mime_types();
	}
	$type = false;
	$ext  = false;

	foreach ( $mimes as $ext_preg => $mime_match ) {
		$ext_preg = '!\.(' . $ext_preg . ')$!i';
		if ( preg_match( $ext_preg, $filename, $ext_matches ) ) {
			$type = $mime_match;
			$ext  = $ext_matches[1];
			break;
		}
	}

	return compact( 'ext', 'type' );
}