PHP: cURL refuse connection to URL and send GET information on some server

Question

I made function to read GeoPlugin data for my websites and on one server I find wierd issue. All cURL request are refused. Here is part of my code:

protected $url='http://www.geoplugin.net/json.gp?ip={IP}&base_currency={CURRENCY}';

protected function __get_data($ip=false, $currency='')
    {
        // Current or custom IP
        $ip = ((is_bool($ip) && $ip==false) ? $this->__ip() : $ip);
        if($ip!='127.0.0.1' || $ip!='0.0.0.0')
        {
            // Configure GET function
            $url = str_replace('{IP}', $ip, $this->url );
            if(empty($currency))
                $url = str_replace( '&base_currency={CURRENCY}', '', $url);
            else
                $url = str_replace( '{CURRENCY}', $currency, $url);
            // Get content from URL
            if(function_exists("curl_init"))
            {
                $cURL = curl_init();
                curl_setopt($cURL, CURLOPT_URL, $url);
                curl_setopt($cURL, CURLOPT_CONNECTTIMEOUT ,5); 
                curl_setopt($cURL, CURLOPT_TIMEOUT , 2);
                curl_setopt($cURL, CURLOPT_SSL_VERIFYPEER, false);
                curl_setopt($cURL, CURLOPT_RETURNTRANSFER, true);
                curl_setopt($cURL, CURLOPT_HTTPHEADER, array('Accept: application/json'));
                $result = curl_exec($cURL);
                curl_close($cURL);
            }
            else
            {
                $result = file_get_contents($url);
            }
            // Return objects from JSON data
            if($result!=false)
            {
                return json_decode($result);
            }
            else return false;
        }
        else return false;
    }

    ## find real IP adress of visitor ##
    protected function __ip()
    {
        $findIP=array(
            'HTTP_CLIENT_IP',
            'HTTP_X_FORWARDED_FOR',
            'HTTP_X_FORWARDED',
            'HTTP_X_CLUSTER_CLIENT_IP',
            'HTTP_FORWARDED_FOR',
            'HTTP_FORWARDED',
            'REMOTE_ADDR'
        );
        $ip = '';
        foreach($findIP as $http)
        {
            if(function_exists("getenv"))
            {
                $ip = getenv($http);
            }
            else
            {
                if (array_key_exists($http, $_SERVER) !== false){
                    foreach (explode(',', $_SERVER[$http]) as $findIP){
                        $ip = trim($findIP);

                    }
                }
            }
            if(function_exists("filter_var") && !empty($ip))
            {
                if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE) !== false) return $ip;

            }
            else if(preg_match('/^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/', $ip) && !empty($ip))
            {
                return $ip;
            }
        }
        return '0.0.0.0';
    }

On arround90 websites everithing work perfectly, on one website with var_dump() I find that connection are refused. I try also with file_get_contents and the same results. I try also just cURL call in some test PHP file separated from website and the same results. What can be a problem?

Answer 1

cURL might be disabled in your server.

Please run the phpinfo() to check the status of cURL.

If it is disabled, please install cURL and enable it in PHP.

Answer 2

1. It's may be DNS problem;

2. It's may be poor connection (more time needed for loading);

3. Your query may be banned from target server, because from your IP (source's server IP) too much queries for a time, more than limits.

What you can do:

1. Make sure that you can open target url from source server without using cURL (if you use simple hosting, I mean not VPS, you'll can't check it);

2. Increase values for CURLOPT_CONNECTTIMEOUT and CURLOPT_TIMEOUT;

3. If problem will not solved, you should use proxy with cURL (look for official documentation about CURLOPT_PROXY and other proxy options for curl_setopt function).