function retrieve($url) { preg_match('/\/([^\/]+\.[a-z]+)[^\/]*$/',$url,$match); return $match[1]; }
<?php function getExt($url) { $path=parse_url($url); $str=explode('.',$path['path']); return $str[1]; } echo getExt('http://www.sina.com.cn/abc/de/fg.php?id=1'); ?>
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