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我有一段代码，它做谷歌登录它在下面给出。这是在正常的PHP，它包含一个文件。代码如下。如何从webroot包含php文件中的ctp文件中的php文件？
require 'openid.php';
try {
# Change 'localhost' to your domain name.
$openid = new LightOpenID('http://s396001438.onlinehome.us/test2/');
if(!$openid->mode) {
if(isset($_GET['login'])) {
$openid->identity = 'https://www.google.com/accounts/o8/id';
header('Location: ' . $openid->authUrl());
}
?>
<form action="?login" method="post">
<button>Login with Google</button>
</form>
<?php
} elseif($openid->mode == 'cancel') {
echo 'User has canceled authentication!';
`enter code here`} else {
echo 'User ' . ($openid->validate() ? $openid->identity . ' has ' : 'has not ') . 'logged in.';
}
}catch(ErrorException $e) {echo $e->getMessage();}