PHP detects whether the URL URL link is normally accessible

Reading guide ：

In some scenarios , Need to access URL URL link implementation http request , If the URL link is blocked （ For example, the server is shut down ）, that http The request will be blocked ,PHP It's single threaded , Once there is no response for a long time , It will give users a very bad experience . therefore , A good solution is to check whether the website can be connected normally .

Method 1 ：

/**
 *  Check whether the URL connection is available 
 **/
function check_url($url){
	if (@fopen($url, 'r')==false) {
			return false;
	}
	return true;
}

Method 2 ： 

/**
 *  Check whether the URL connection is available 
 **/
function check_url($url){
	$httpcode = 0;
    $ch = curl_init();
    $timeout = 1; //  Set the timeout time [ Company ： second ]
    curl_setopt($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,$url);
    curl_exec($ch);
    #  Get status code assignment 
    $httpcode = curl_getinfo($ch,CURLINFO_HTTP_CODE);
    curl_close($ch);
	if($httpcode == 200){
		return true;
	}else{
		return false;
	}
}