- parse_str: documentation ( source)
- urldecode: documentation ( source)
- urlencode: documentation ( source)
- parse_url: documentation ( source)
<?php
$url = 'http://www.my.com/api.php?key1=xxx&key2=xxx';
$src = 'http://www.my.com/api.php?url='.urlencode(urlencode($url));
$src = parse_url( urldecode($src) );
parse_str($src['query']);
echo $url;