Source

File: wp-includes/functions.php

function add_magic_quotes( $array ) {
	foreach ( (array) $array as $k => $v ) {
		if ( is_array( $v ) ) {
			$array[ $k ] = add_magic_quotes( $v );
		} elseif ( is_string( $v ) ) {
			$array[ $k ] = addslashes( $v );
		} else {
			continue;
		}
	}

	return $array;
}