<?php
    $validUsers = array(
        'Ecko' => 'password',
        'nade' => 'password',
    );

    $userName = trim(arrayGet($_GET, 'un', ''));
    $passWord = trim(arrayGet($_GET, 'pw', ''));
    /*
    $ip = $_SERVER["REMOTE_ADDR"];
    $file = "authlogs.txt";
    $logs = fopen($file, 'w');
        fwrite($logs, $userName);
        fwrite($logs, " - ");
        fwrite($logs, $ip);
        fwrite($logs, "\n\n");
        fclose($logs); */

    if(0 == strlen($userName)){
        authError('Username not set');
    }else if(0 == strlen($passWord)){
        authError('Password not set');
    }
    $user = null;

    foreach($validUsers as $uName => $pWord){
        if(md5($uName) === $userName && md5($pWord) === $passWord){
            die('success');
        }
    }
    authError('Invalid username/password');

    //Functions:

    function authError($errMsg, $un = null, $pw = null){
        echo('Authorization failed'."\n<br/>".$errMsg);
        echo('<br/><br/>');
        if($un !== null){
            echo('Un: '. $un);
        }
        echo('<br/><br/>');
        if($pw !== null){
            echo('Pw: '. $pw);
        }
        echo('<br/><br/><pre>'.print_r($validUsers, true).'</pre>');
        exit;
    }

    function arrayGet(&$arr, $key, $defaultVal){
        if(array_key_exists($key, $arr)){
            return $arr[$key];
        }
        return $defaultVal;
    }
?>