<?php


    if(empty($_SERVER['PHP_AUTH_USER']))  
    {  
        header('WWW-Authenticate: Basic realm="Administrative resource"');  
        header("HTTP/1.0 401 Unauthorised");  
        echo 'вы не ввели логин/пароль';
        exit();   
    } 

    $admins = array(  
                      'root'   => 'root',  
                      'test' => 'test',  
                    );
    $key = false;  
      
    if(isset($admins[$_SERVER['PHP_AUTH_USER']])
              && md5($_SERVER['PHP_AUTH_PW']) === $admins[$_SERVER['PHP_AUTH_USER']])    
        $key = true;

    if(empty($key))      
    {              
        header('WWW-Authenticate: Basic realm="Administrative resource1"');        
        header ('HTTP/1.0 401 Unauthorized');
        echo 'неправильный логин/пароль';      
        exit();      
    } 

?>

header('WWW-Authenticate: Basic realm="Administrative resource"');  
        header("HTTP/1.0 401 Unauthorised");  
        echo 'вы не ввели логин/пароль';
        exit();