xin code nhận diện link

<?php
function Auto_Link_IMG($content) { 
 function GET_TYPE($url) { 
 $img = '/[.](jpg|png|gif|jpeg|bmp)$/i'; 
 
 if (preg_match($img, $url)) { return ' [img]' . $url . '[/img]'; } 
 else { return ' ' . $url; } 
 } 

 $url_match = $url_replace = array(); 
 $url_match[] = '#(^|[\n\t (>.])([a-z][a-z\d+]*:/{2}(?:(?:[a-z0-9\-._~!$&\'(*+,;=:@|]+|%[\dA-F]{2})+|[0-9.]+|\[[a-z0-9.]+:[a-z0-9.]+:[a-z0-9.:]+\]???::\d*???:/(?:[a-z0-9\-._~!$&\'(*+,;=:@|]+|%[\dA-F]{2})*)*(?:\???:[a-z0-9\-._~!$&\'(*+,;=:@/?|]+|%[\dA-F]{2})*???:\#(?:[a-z0-9\-._~!$&\'(*+,;=:@/?|]+|%[\dA-F]{2})*)))#ieu'; 
 $url_replace[] = "GET_TYPE('$2')"; 
 return preg_replace($url_match, $url_replace, $content); 
}
?>