关于HTTP BASIC权限认证解决方案

<?php<br />  if (!isset($_SERVER['PHP_AUTH_USER'])) {<br />    header('WWW-Authenticate: Basic realm="My Realm"');<br />    header('HTTP/1.0 401 Unauthorized');<br />    echo 'Text to send if user hits Cancel button';<br />    exit;<br />  } else {<br />    echo "<p>hello {$_server['php_auth_user']}.</p>";<br />    echo "<p>You entered {$_SERVER['PHP_AUTH_PW']} as your password.</p>
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                ";<br />  }<br />?>  <br />