The best way to determine whether a URL is valid in PHP_PHP Tutorial

1. Determine whether a URL can be accessed normally to avoid the problem of a fatal error and program termination when using file_get_contents because the URL cannot be accessed.

$url = 'http://www.bkjia.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
{
….
}

Also, you can use the following code:

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 function must be used after curl_exec(), which seems a bit redundant. .

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