<?php
$username = 'user';
$password = 'pass';
$file_name = 'test_image.png';

list($page, $cookies) = login($username, $password);
$token = imageuploadpage($cookies);
$result = upload($token, $cookies, $file_name);

echo $result;

function login($username, $password)
{
    $url = 'http://codequiz.saudqq.com/quiz1/login.php';
    $post_data = [
            'user' => $username,
            'pass' => $password
        ];
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 6.3; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0');
    curl_setopt($ch, CURLOPT_HTTPHEADER, ['Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8']);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_HEADER, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS,  http_build_query($post_data));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 15);
    curl_setopt($ch, CURLOPT_TIMEOUT, 15);
    $data = curl_exec($ch);
    preg_match('/Set-Cookie: (.*)\b/', $data, $cookie_match);
    $cookies = (array)http_parse_cookie($cookie_match[1]); // would be a problem if there is 2 headers set-cookie
    return [$data, $cookies];
}

function imageuploadpage($cookies)
{
    $url = 'http://codequiz.saudqq.com/quiz1/';
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 6.3; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0');
    curl_setopt($ch, CURLOPT_HTTPHEADER, ['Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8']);
    curl_setopt($ch, CURLOPT_COOKIE, http_build_cookie($cookies));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 15);
    curl_setopt($ch, CURLOPT_TIMEOUT, 15);
    $page = curl_exec($ch);
    $doc = new DOMDocument();
    $doc->loadHTML($page);
    $xpath = new DOMXPath($doc);
    $nodes = $xpath->query('//head/meta');
    foreach($nodes as $node) {
        if($node->getAttribute('name') == 'token') {
            return $node->getAttribute('content');
        }
    }
}

function upload($token, $cookies, $file_name)
{
    $url = 'http://codequiz.saudqq.com/quiz1/upload.php';
    $curl_image_file = new CURLFile($file_name, image_type_to_mime_type(exif_imagetype($file_name)), $file_name);
    $post_data = [
            'upl' => $curl_image_file,
            't' => $token
        ];
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 6.3; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0');
    curl_setopt($ch, CURLOPT_HTTPHEADER, ['Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'Referer: http://codequiz.saudqq.com/quiz1/', 'Content-Type: multipart/form-data']);
    curl_setopt($ch, CURLOPT_COOKIE, http_build_cookie($cookies));
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_HEADER, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS,  $post_data);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 15);
    curl_setopt($ch, CURLOPT_TIMEOUT, 15);
    $data = curl_exec($ch);
    return $data;
}

// I got trouble with pecl_http module for centos7/php7 so it is my workaround
function http_parse_cookie($szHeader, $object = true)
{
    $obj         = new stdClass;
    $arrCookie   = array();
    $arrObj      = array();
    $arrCookie =  explode("\n", $szHeader);
    for($i = 0; $i<count($arrCookie); $i++){
        $cookie          = $arrCookie[$i];
        $attributes      = explode(';', $cookie);
        $arrCookie[$i]   = array();
        foreach($attributes as $attrEl){
            $tmp = explode('=', $attrEl, 2);
            if(count($tmp)<2){
                continue;
            }
            $key     = trim($tmp[0]);
            $value   = trim($tmp[1]);
            if($key=='version'||$key=='path'||$key=='expires'||$key=='domain'||$key=='comment'){
                if(!isset($arrObj[$key])){
                    $arrObj[$key] = $value;
                }
            }else{
                $arrObj['cookies'][$key] = $value;
            }
        }
    }
    if($object===true){
        $obj     = (object)$arrObj;
        $return  = $obj;
    }else{
        $return = $arrObj;
    }
    return $return;
}

function http_build_cookie($array)
{
    $result = [];
    foreach($array['cookies'] as $key => $value) {
        $result[] = "$key=$value";
    }
    return implode(";", $result);
}