UTF8 encode array/object structure in PHP

gistfile1.php

<?php
function utf8_encode_deep(&$input) {
	if (is_string($input)) {
		$input = utf8_encode($input);
	} else if (is_array($input)) {
		foreach ($input as &$value) {
			utf8_encode_deep($value);
		}
		
		unset($value);
	} else if (is_object($input)) {
		$vars = array_keys(get_object_vars($input));
		
		foreach ($vars as $var) {
			utf8_encode_deep($input->$var);
		}
	}
}
?>

thanks :)