PHP Check if the site is down for instance code

This article mainly and we introduce PHP check whether the site is down, combined with specific examples of PHP based on a curl session of the Web site to check the status of the relevant operation skills, the need for friends can refer to, hope to help everyone.

<?phpfunction Networkcheck ($url) {$agent = "mozilla/5.0 (Windows NT 6.1; WOW64;  rv:42.0) gecko/20100101 firefox/42.0 ";  curl_init-Initializes a Curl session $ch =curl_init ();  Curl_setopt-set session parameters for a Curl curl_setopt ($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-performs a curl session $page =curl_exec ($ch);  Curl_getinfo-gets the information for a Curl connection resource handle $httpcode = Curl_getinfo ($ch, Curlinfo_http_code);  The function of the Curl_close () function is to close a curl session, and the only argument is the handle returned by the Curl_init () function.  Curl_close ($ch);  if ($httpcode >=200 && $httpcode <300) return true; else return false;} The function parameter is the URL path of the site to be inspected if (Networkcheck ("https://www.baidu.com")) echo "Website OK"; else echo "Website down";? 
 

Run Result: Website OK

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