<?php

$url="http://www.tugaga.com";

ini_set('user_agent','Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727;)');

$array = get_headers($url,1);

if(!preg_match('/200/',$array[0])){

   print_r("访问异常"."\n");

}else{

   print_r("正常访问"."\n");

};

?>