Check if url exists or not using PHP cURL

Question

currently i am using following function

function urlExist($url)
{
                $handle   = curl_init($url);
                if (false === $handle)
                {
                        return false;
                }
                curl_setopt($handle, CURLOPT_HEADER, false);
                curl_setopt($handle, CURLOPT_FAILONERROR, true);  // this works
                curl_setopt($handle, CURLOPT_HTTPHEADER, Array("User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.15) Gecko/20080623 Firefox/2.0.0.15") ); // request as if Firefox
                curl_setopt($handle, CURLOPT_NOBODY, true);
                curl_setopt($handle, CURLOPT_RETURNTRANSFER, false);
                $connectable = curl_exec($handle);
                ##print $connectable;
                curl_close($handle);
                return $connectable;
}

It works fine for simple url but does not work for url that redirects to another domain

alexn · Accepted Answer · 2012-09-26 20:28:12Z

6

You need to setFOLLOWLOCATION:

curl_setopt($handle, CURLOPT_FOLLOWLOCATION, true);

However, there is no point in issuing a GET request here. A simple HEAD is lighter since only headers are transferred. To do that, set NOBODY to true:

curl_setopt($handle, CURLOPT_NOBODY, true);

edited Sep 26, 2012 at 20:28

answered Apr 11, 2012 at 9:52

alexn

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Antoine Subit · Accepted Answer · 2016-10-11 09:57:57Z

I'm using the same function but i'm not meeting problem with domain trieuvieclam.com redirect to new domain. I'm using CHROME browser

function url_exists($url) {
    $handle   = curl_init($url);
    if (false === $handle)
    {
            return false;
    }

    curl_setopt($handle, CURLOPT_HEADER, false);
    curl_setopt($handle, CURLOPT_FAILONERROR, true);  // this works
    curl_setopt($handle, CURLOPT_HTTPHEADER, Array("User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.15) Gecko/20080623 Firefox/2.0.0.15") ); // request as if Firefox
    curl_setopt($handle, CURLOPT_NOBODY, true);
    curl_setopt($handle, CURLOPT_RETURNTRANSFER, false);
    curl_setopt($handle, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($handle, CURLOPT_CONNECTTIMEOUT, 3);
    $connectable = curl_exec($handle);
    ##print $connectable;
    curl_close($handle);
    if($connectable){
        return true;
    }
    return false;
}

I have tried change this line :curl_setopt($handle, CURLOPT_FOLLOWLOCATION, true); to false, but the result is still the same (existing the domain).

if (false === $handle)
        {
                return false;
        }

This condition never meet for any string, even not an url, maybe it only match when curl is not supported in the server.

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