I dont understand when I echo $httpCode I always get 0, I was expecting 404 when I change $html_brand into a broken url. Is there anything that I miss or do not know of? Thanks.

 //check if url exist $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $html_brand); curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); $response = curl_exec($ch); $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE); if ($httpCode == 404) { echo "The Web Page Cannot Be Found"; return; } curl_close($ch);
0

11 Answers

If you connect with the server, then you can get a return code from it, otherwise it will fail and you get a 0. So if you try to connect to "" you will get a return code of 400, if you go directly to google.com, you will get 302 (and then 200 if you forward to the next page... well I do because it forwards to google.com.br, so you might not get that), and if you go to "googlecom" you will get a 0 (host no found), so with the last one, there is nobody to send a code back.

Tested using the code below.

<?php $html_brand = ""; $ch = curl_init(); $options = array( CURLOPT_URL => $html_brand, CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => true, CURLOPT_FOLLOWLOCATION => true, CURLOPT_ENCODING => "", CURLOPT_AUTOREFERER => true, CURLOPT_CONNECTTIMEOUT => 120, CURLOPT_TIMEOUT => 120, CURLOPT_MAXREDIRS => 10, ); curl_setopt_array( $ch, $options ); $response = curl_exec($ch); $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE); if ( $httpCode != 200 ){ echo "Return code is {$httpCode} \n" .curl_error($ch); } else { echo "<pre>".htmlspecialchars($response)."</pre>"; } curl_close($ch);
4

Try this after curl_exec to see what's the problem: 

print curl_error($ch);

If it's print something like 'malformed' then check your URL format.

3

check the curl_error after the curl_getinfo to find out the hidden errors. 

if(curl_errno($ch)){ echo 'Curl error: ' . curl_error($ch); }

Try this:

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
3

Like said here and below, a failed request (i.e. the server is not found) returns false, no HTTP status code, since a reply has never been received.

Call curl_error().

I had same problem and in my case this was because curl_exec function is disabled in php.ini. Check for logs:

PHP Warning: curl_exec() has been disabled for security reasons in /var/www/***/html/test.php on line 18

Solution is remove curl_exec from disabled functions in php.ini on server configuration file.

What is the exact contents you are passing into $html_brand?

If it is has an invalid URL syntax, you will very likely get the HTTP code 0.

If you're using selinux it might be because of security restrictions. Try setting this as root:

# setsebool -P httpd_can_network_connect on

For me, issue wat the URL, untill I encoded url parameter values, I got http code 0.

Another reason for PHP to return http code 0 is timeout. In my case, I had the following configuration:

curl_setopt($http, CURLOPT_TIMEOUT_MS,500);

It turned out that the request to the endpoint I was pointing to always took more than 500 ms, always timing out and always returning http code 0.

If you remove this setting (CURLOPT_TIMEOUT_MS) or put a higher value (in my case 5000), you'll get the actual http code, in my case a 200 (as expected).

See

Also check the order in which the commands are executed.

First curl_exec and then curl_getinfo.

$response = curl_exec($ch); $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);