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Question

my curl code show me a blank page

 <?
$ch = curl_init();
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_URL,"http://mysite/scripts/showsomething.php");
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
$result=curl_exec ($ch);
curl_close ($ch);
$core = explode('<!--- BEGIN -->', $result); 
$main = explode('<!--- END -->', $core[1]);
echo $main[0]; 
?>

this code works fine on localhost, but not on server...

Answer 1

There can be several reasons behind your problem.

1) Change <? into <?php and see whether it works or not.

2) For a short test, run this code from your server and check whether it shows you the output or not.

<?php
  echo "sabuj";
?>

3) Some site seek for useragent string on their website request. When they found no useragent, they use to return blank page. You can overcome this with setting an useragent like below.

curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0');

4) Another thing you can do is, access the server with ssh client(if you have any) and run the url with wget tool and see whether you can download your page or not.

wget "http://yoursite/page/blabla/...php"

5) Finally, run your curl code with verbose mode enabled. It will help you to debug your curl requests.

curl_setopt($ch, CURLOPT_VERBOSE,true);

Answer 2

Working Code...

       $ch = curl_init();
       $timeout = 10;
       curl_setopt($ch, CURLOPT_URL, $url);
       curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
       curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
       $data = curl_exec($ch);
       curl_close($ch);
       var_dump($data);

Hope it helps...

Answer 3

Turn your error reporting all the way to 11.

error_reporting(E_ALL);

This will tell you a little more about the issue you are facing. The most common culprit when working with curl on a dev environment and moving to a server is a missing curl package.

You can check to see if you have curl installed by doing the following:

if(!function_exists('curl_version')) {
    throw new Exception('Curl package missing');
}

Thus "PHP Fatal error: Call to undefined function curl_init() in..." is a very common error that is thrown.

Some additional debugging tips are to..

1. print_r the response of curl_exec($handle);
2. print_r curl_error($handle) this will give you a curl error code.
3. setup a curl proxy using set_opt and CURLOPT_PROXY, set the value to your ip:port, open the port 8888 on your router and install charles proxy. This will show you an exact printout of the request and response.

Answer 4

I've read the previous answers and it seems that your code is fine but problem is connectivity to remote server, please try this:

<?
//debug
error_reporting(E_ALL);
ini_set('display_errors', 1);
//debug end

$ch = curl_init();
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_URL,"http://mysite/scripts/showsomething.php");
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
$result=curl_exec ($ch);
curl_close ($ch);
echo result;
?>

what does it output ?

Notes:

Do you administer the other server?
if not, is there a possibility that your ip was blocked by the remote server?
Does script http://mysite/scripts/showsomething.php contains any errors ?
If you're able to edit it, please enable php errors on showsomething.php by adding the following code at the top of it :

error_reporting(E_ALL);
ini_set('display_errors', 1);

Answer 5

I've solved the problem by adding the following code. The problem is SSL.

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

I hope it helps.