//php检查域名是否可以正常访问的方法
function httpcode($url){
$ch = curl_init();
$timeout = 3;
curl_setopt($ch,CURLOPT_FOLLOWLOCATION,1);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
curl_setopt($ch,CURLOPT_URL,$url);
// 支持https判断
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_exec($ch);
$httpcode= curl_getinfo($ch,CURLINFO_HTTP_CODE);
curl_close($ch);
// 返回200说明请求正常
return $httpcode;
}
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