php获取http头部请求状态信息

$curl = curl_init();
$url=’https://www.111cn.net’;
curl_setopt($curl, CURLOPT_URL, $url); //设置URL
curl_setopt($curl, CURLOPT_HEADER, 1); //获取Header
curl_setopt($curl,CURLOPT_NOBODY,true); //Body就不要了吧，我们只是需要Head
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); //数据存到成字符串吧，别给我直接输出到屏幕了
$data = curl_exec($curl); //开始执行啦～
echo curl_getinfo($curl,CURLINFO_HTTP_CODE); //我知道HTTPSTAT码哦～
curl_close($curl); //用完记得关掉他

if(!function_exists('get_headers')){
function get_headers($url,$format=0){
$url=parse_url($url);
$end="＼r＼n＼r＼n";
$fp=fsockopen($url['host'],(empty($url['port'])?80:$url['port']),$errno,$errstr,30);
if($fp){
$out="GET / HTTP/1.1＼r＼n";
$out.="Host: ".$url['host']."＼r＼n";
$out.="Connection: Close＼r＼n＼r＼n";
$var='';
fwrite($fp,$out);
while(!feof($fp)){
$var.=fgets($fp,1280);
if(strpos($var,$end))
break;
}
fclose($fp);
$var=preg_replace("/＼r＼n＼r＼n.*＼$/",'',$var);
$var=explode("＼r＼n",$var);
if($format){
foreach($var as $i){
if(preg_match('/^([a-zA-Z -]+): +(.*)$/',$i,$parts))
$v[$parts[1]]=$parts[2];
}
return $v;
}else{
return $var;
}
}
}
}
echo '

';

print_r(get_headers('https://www.111cn.net'));