File: poll.php

<?PHP
    define('TIME_LIMIT', 86400); //Time (in sec) after a user can vote again from a IP
    session_start();

    if (!isset($_SESSION['ip'])) {
        $_SESSION['ip'] = $_SERVER['REMOTE_ADDR'];
        $_SESSION['start_time'] = time();
    }
    else {
        if ( ($_SESSION['start_time'] - time()) < TIME_LIMIT) {
            die("ip=".$_SESSION['ip']);
        }
    }
    /**
     * Function to increase the team counter
     *
     * @param string $team
     * 
     * @return void
     */
    function increaseCounter($team) {
        $score = file_get_contents('includes/pollresult/'.$team.'.txt') or die("Error: Cannot read $team file.");
        
        $score = $score +1;
        
        $fp = fopen($team.'.txt', 'w') or die("Error: Cannot open $team file.");
        fwrite($fp, $score) or die("Error: Cannot write to $team file.");
        fclose($fp);        
    }
    
    if (isset($_POST['option'])) {
        $vote = $_POST['option'];
        
        $brazil = file_get_contents('brazil.txt');
        $england = file_get_contents('england.txt');
        $france = file_get_contents('france.txt');
        $germany = file_get_contents('germany.txt');
        
        $total = ($brazil+$germany+$france+$england);
        
        $return = "<BR /><BR />";
        
        $return .= "&nbsp;&nbsp;Brazil: ". (int) (($brazil/$total)*100)."% <BR />";
        $return .= "&nbsp;&nbsp;England: ". (int) (($england/$total)*100)."% <BR />";
        $return .= "&nbsp;&nbsp;France: ". (int) (($france/$total)*100)."% <BR />";
        $return .= "&nbsp;&nbsp;Germany: ". (int) (($germany/$total)*100)."% <BR />";        
        
        $return .= "<BR /><BR />";
        echo $return;
    }
    else {
        echo "Internal error";
    }    
?>