我有 2 个 PHP 文件，一个是 index.php，另一个是 paypal.php。paypal.php 的代码是：
<?php
session_start();
$client_id = 'xxxxxxxxxxxx';
$client_secret = 'xxxxxxxxxxxxxxxxxxxx';
$scopes = 'email profile';
$app_return_url = 'http://xxx.com/xxx/paypal.php';
$nonce = time() . rand();
$code = $_REQUEST["code"];
if(empty($code)) {
$_SESSION['state'] = md5(uniqid(rand(), TRUE));
$paypal_auth_url = "https://www.paypal.com/webapps/auth/protocol/openidconnect/v1/authorize?"
."client_id=".$client_id
."&response_type=code"
."&scope=".$scopes
."&nonce=".$nonce
."&state=".$_SESSION['state']
."&redirect_uri=".urlencode($app_return_url);
header("Location: $paypal_auth_url");
}else{
$token_url = "https://www.paypal.com/webapps/auth/protocol/openidconnect/v1/tokenservice";
$postvals = "client_id=".$client_id
."&client_secret=".$client_secret
."&grant_type=authorization_code"
."&code=".$code;
$ch = curl_init($token_url);
$options = array(
CURLOPT_POST => 1,
CURLOPT_VERBOSE => 1,
CURLOPT_POSTFIELDS => $postvals,
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_SSLVERSION => 3
);
curl_setopt_array( $ch, $options );
$response = curl_exec($ch);
curl_close($ch);
$atoken = json_decode($response);
$profile_url = "https://www.paypal.com/webapps/auth/protocol/openidconnect/v1/userinfo?"
."schema=openid"
."access_token=".$atoken->access_token;
$ch = curl_init($profile_url);
$options = array(
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_SSLVERSION => 3
);
curl_setopt_array( $ch, $options );
$response = curl_exec($ch);
curl_close($ch);
$profile= json_decode($response,true);
$_SESSION['paypal_user'] = "true";
$_SESSION['profile'] = $profile;
echo("<script> top.location.href='index.php'</script>");
}
?>
index.php 的代码是：
<?php
session_start();
// LOGOUT
if ($_GET['logout'] == 'true'){
$_SESSION['paypal_user']="";
}
if (strlen($_SESSION['paypal_user'])){
// LOGGED USER
echo "<pre>";
print_r($_SESSION['profile']);
echo "</pre>";
echo "<br><BR> <a href='?logout=true'>LOGOUT</a>";
}else{
// LOGIN
?>
<a href='paypal.php' title='Paypal oAuth Login'>
<img src='https://www.paypalobjects.com/en_US/Marketing/i/btn/login-with-paypal-button.png'>
</a>
<?
}
?>
任何想法为什么此代码不起作用？我尝试了 var_dump json_decode 并返回 null。
谢谢！