PHP检查网站是否宕机的方法示例

<?phpfunction Networkcheck($url){  $agent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0";  //curl_init-初始化一个curl会话  $ch=curl_init();  //curl_setopt — 为一个curl设置会话参数  curl_setopt($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);  //curl_exec —执行一个curl会话  $page=curl_exec($ch);  //curl_getinfo — 获取一个curl连接资源句柄的信息  $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);  //curl_close()函数的作用是关闭一个curl会话，唯一的参数是curl_init()函数返回的句柄。  curl_close($ch);  if($httpcode>=200 && $httpcode<300)    return true;  else    return false;}//函数参数为要检查的网站的网址路径if(Networkcheck("https://www.baidu.com"))  echo "Website OK";else  echo "Website DOWN";?>