How to determine whether the URL is valid in php

Determine whether a url can be accessed normally to avoid the problem of terminating the program because the url cannot be accessed and a fatal error occurs when using file_get_contents

The code is as follows:

$url = ‘http://www.baidu.com'; 
$ch = curl_init(); 
$timeout = 10; 
curl_setopt ($ch, CURLOPT_URL, $url); 
curl_setopt($ch, CURLOPT_HEADER, 1); 
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout); 
$contents = curl_exec($ch); 
if(false == $contents) 
{ 
echo ‘Curl error: ‘ . curl_error($ch); 
} 
else 
{ 
…. 
}

In addition, you can use

The code is as follows:

curl_getinfo($ch, CURLINFO_HTTP_CODE);

Get the code returned by the HTTP header file. If it is 200, the url can be accessed normally, but this functionMust be used after curl_exec(), which seems a bit redundant.

The above is the detailed content of How to determine whether the URL is valid in php. For more information, please follow other related articles on the PHP Chinese website!