<?php

   //Basic HTTP 认证

  if (!isset($_SERVER['PHP_AUTH_USER'])) {

    header('WWW-Authenticate: Basic realm="test"');

    header('HTTP/1.0 401 Unauthorized');

  } else {

	if($_SERVER['PHP_AUTH_USER']=='admin' && $_SERVER['PHP_AUTH_PW']=='123456'){

		echo "<p>HI {$_SERVER['PHP_AUTH_USER']}.</p>";

		echo "<p>恭喜你登录成功！</p>";

	}else{

		header('WWW-Authenticate: Basic realm="test"');

		header('HTTP/1.0 401 Unauthorized');

	}

  }

?>

<?php

$realm = 'Restricted area';

$username = 'ser';			//帐号

$passowrd = '666666';		//密码

if (empty($_SERVER['PHP_AUTH_DIGEST'])) {

    header('HTTP/1.1 401 Unauthorization Required');	//此头弹出登录窗口

    header('WWW-Authenticate: Digest realm="'.$realm.'",qop="auth", nonce="'.uniqid().'", opaque="'.md5($realm).'"');

    die('您取消了本次登录，若重新登录，请刷新此页面。');

}else{

	 //使用函数http_digest_parse解析验证信息

	if (!($data = http_digest_parse($_SERVER['PHP_AUTH_DIGEST'])) || $data['username']!=$username){

		header("HTTP/1.1 401 Unauthorization Required");

		header('WWW-Authenticate: Digest realm="'.$realm.'",qop="auth", nonce="'.uniqid().'", opaque="'.md5($realm).'"');//IE 8 需要重新发送，不然不弹窗

		die('账号错误！');

	}

	//拼接字符串

	$A1 = md5($username . ':' . $realm . ':' . $passowrd);

	$A2 = md5($_SERVER['REQUEST_METHOD'].':'.$data['uri']);

	$valid_response = md5($A1.':'.$data['nonce'].':'.$data['nc'].':'.$data['cnonce'].':'.$data['qop'].':'.$A2);

	if ($data['response'] != $valid_response){

	  header("HTTP/1.1 401 Unauthorization Required");

	  header('WWW-Authenticate: Digest realm="'.$realm.'",qop="auth", nonce="'.uniqid().'", opaque="'.md5($realm).'"');

	  die('账号/密码错误！');

	}

	echo 'Hi '.$username.',恭喜你登录成功！';

}

// 解析字符串方法

function http_digest_parse($txt)

{

    // protect against missing data

    $needed_parts = array('nonce'=>1, 'nc'=>1, 'cnonce'=>1, 'qop'=>1, 'username'=>1, 'uri'=>1, 'response'=>1);

    $data = array();

    preg_match_all('@(\w+)=([\'"]?)([a-zA-Z0-9=./\_-]+)\2@', $txt, $matches, PREG_SET_ORDER);

	//print_r($matches);

    foreach ($matches as $m) {

        $data[$m[1]] = $m[3];

        unset($needed_parts[$m[1]]);

    }

    return $needed_parts ? false : $data;

}

?>