收集整理的非常有用的PHP函数

PHP检查是否宕机

function visit($url){ 
  $agent = "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)";
  $ch=curl_init(); 
  curl_setopt ($ch, CURLOPT_URL,$url ); 
  curl_setopt($ch, CURLOPT_USERAGENT, $agent); 
  curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); 
  curl_setopt ($ch,CURLOPT_VERBOSE,false); 
  curl_setopt($ch, CURLOPT_TIMEOUT, 5); 
  curl_setopt($ch,CURLOPT_SSL_VERIFYPEER, FALSE); 
  curl_setopt($ch,CURLOPT_SSLVERSION,3); 
  curl_setopt($ch,CURLOPT_SSL_VERIFYHOST, FALSE); 
  $page=curl_exec($ch); //echo curl_error($ch); 
  $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE); 
  curl_close($ch); 
  if($httpcode>=200 && $httpcode<300) return true; 
  else return false; 
}
Website DOWN