Free Online Tutorials

This is a useful class written by me and use it regularly.

Features

• HTTPS connection
• Basic authorization,
• HTTP proxy
• SOCKS5 proxy
• Cookie jar
• and much more…

<?

/**
 * @class: CURL	 	 
 * @version: 1.0	 	 
 * @author: phptuts	 	 
 * @link: http://tutorialspots.com/	 	 
 */
class CURL
{
    var $contents;
    var $_header;
    var $headers = array();
    var $body;
    var $url = "";
    var $realm;
    var $ua = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1) Gecko/20061010 Firefox/2.0";
    var $proxy;
    var $prtype;
    var $tout = 10;
    var $opts = false;
    var $cookiefile = "cookie.txt";
    var $httpheader = array();
    var $follow = false;
    var $referer = "";
    var $ch;
    function exec($method, $url, $vars = "", $h = 1)
    {
        $this->ch = curl_init();
        curl_setopt($this->ch, CURLOPT_URL, $url);
        curl_setopt($this->ch, CURLOPT_HEADER, ($h == 2) ? 0 : 1);

        if (is_array($this->realm))
        {
            curl_setopt($this->ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
            curl_setopt($this->ch, CURLOPT_USERPWD, $this->realm[0] . ':' . $this->realm[1]);
        }

        if ($this->proxy != "")
        {
            if (strstr($this->proxy, "@"))
            {
                $t = explode("@", $this->proxy);
                $up = $t[0];
                $ip = $t[1];
            }
            curl_setopt($this->ch, CURLOPT_PROXY, isset($ip) && $ip ? $ip : $this->proxy);
            curl_setopt($this->ch, CURLOPT_PROXYTYPE, $this->prtype);
            if (isset($up) && $up)
            {
                curl_setopt($this->ch, CURLOPT_PROXYAUTH, CURLAUTH_NTLM);
                curl_setopt($this->ch, CURLOPT_PROXYUSERPWD, $up);
            }
        }

        if ($this->ua)
            curl_setopt($this->ch, CURLOPT_USERAGENT, $this->ua);
        if ($this->referer || $this->url)
            curl_setopt($this->ch, CURLOPT_REFERER, $this->referer ? $this->referer : $this->url);

        if ($this->follow)
            curl_setopt($this->ch, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($this->ch, CURLOPT_RETURNTRANSFER, 1);

        if (strncmp($url, "https", 6))
        {
            curl_setopt($this->ch, CURLOPT_SSL_VERIFYPEER, 0);
            curl_setopt($this->ch, CURLOPT_SSL_VERIFYHOST, 0);
        }
        curl_setopt($this->ch, CURLOPT_COOKIEJAR, $this->cookiefile);
        curl_setopt($this->ch, CURLOPT_COOKIEFILE, $this->cookiefile);
        curl_setopt($this->ch, CURLOPT_TIMEOUT, $this->tout);

        if (count($this->httpheader))
        {
            curl_setopt($this->ch, CURLOPT_HTTPHEADER, $this->httpheader);
        }

        curl_setopt($this->ch, CURLOPT_CONNECTTIMEOUT, $this->tout);
        if ($method == 'POST')
        {
            curl_setopt($this->ch, CURLOPT_POST, 1);
            curl_setopt($this->ch, CURLOPT_POSTFIELDS, $vars);
        }

        if (is_array($this->opts) && $this->opts != false)
        {
            foreach ($this->opts as $k => $v)
            {
                curl_setopt($this->ch, $k, $v);
            }
        }

        $data = curl_exec($this->ch);
        $this->url = $url;

        if ($data)
        {
            if (preg_match("/^HTTP\/1\.1 302/", $data) && $h != 2 && strstr($data, "\r\n\r\nHTTP/1.1 200"))
            {
                $pos = strpos($data, "\r\n\r\n");
                $data = substr($data, $pos + 4);
            }

            if ($h == 1 || $h == 2)
                return $data;
            else
            {
                $pos = strpos($data, "\r\n\r\n");
                $this->body = substr($data, $pos + 4);
                $this->_header = substr($data, 0, $pos);
                $this->_header = explode("\r\n", trim($this->_header));
                foreach ($this->_header as $v)
                {
                    $v = explode(":", $v, 2);
                    $this->headers[$v[0]] = isset($v[1]) ? trim($v[1]) : '';
                }
                return $h == 3 ? $this->headers : array($this->headers, $this->body);
            }

        } else
        {
            return curl_error($this->ch);
        }
        $this->close();
    }

    function proxy($proxy, $prtype = CURLPROXY_HTTP)
    { //CURLPROXY_SOCKS5
        $this->proxy = $proxy;
        $this->prtype = $prtype;
    }

    function settimeout($timeout)
    {
        $this->tout = $timeout;
    }

    function get($url, $h = 1)
    {
        return $this->exec('GET', $url, "", $h);
    }

    function post($url, $vars, $h = 1)
    {
        return $this->exec('POST', $url, $vars, $h);
    }

    function setopt($opt, $value = true)
    {
        $this->opts[$opt] = $value;
    }

    function seturl($url)
    {
        $this->url = $url;
    }

    function close()
    {
        curl_close($this->ch);
    }
}

?>

For some usage, you can read more:

PHP & CURL: step by step