<?php  02 if(!function_exists('get_headers')){  03     function get_headers($url,$format=0){  04         $url=parse_url($url);  05         $end="\r\n\r\n";  06         $fp=fsockopen($url['host'],(empty($url['port'])?80:$url['port']),$errno,$errstr,30);  07         if($fp){  08             $out="GET / HTTP/1.1\r\n";  09             $out.="Host: ".$url['host']."\r\n";  10             $out.="Connection: Close\r\n\r\n";  11             $var='';  12             fwrite($fp,$out);  13             while(!feof($fp)){  14                 $var.=fgets($fp,1280);  15                 if(strpos($var,$end))  16                 break;  17             }  18             fclose($fp);  19             $var=preg_replace("/\r\n\r\n.*\$/",'',$var);  20             $var=explode("\r\n",$var);  21             if($format){  22                 foreach($var as $i){  23                     if(preg_match('/^([a-zA-Z -]+): +(.*)$/',$i,$parts))  24                     $v[$parts[1]]=$parts[2];  25                 }  26                 return $v;  27             }else{  28                 return $var;  29             }  30         }  31     }  32 }  33 echo '<pre>';  34 print_r(get_headers('http://www.1sucai.cn'));