<?php
// PayPal认证信息
$client_id = 'AZ5q35RRvAI9oU9ss-E4yRYVELSIaIcLpv_mmd4oPgv7WmvwJupJmzQaQXN2RTsEZgPNQhXmwzGx-D0z';  // 在PayPal开发者平台上获取
$client_secret = 'EOsd5viKcp8D9nd6JewX7tuqFLc6m-0wl4tmHNeHFu8Giwbw1Hf06rxLuDVRH1QJyJTtmg2VXH9-VEcO';  // 在PayPal开发者平台上获取

$api_url = 'https://api.sandbox.paypal.com';  // PayPal 沙箱环境 API 地址

 
// 获取 OAuth 令牌
function getAccessToken($client_id, $client_secret, $api_url) {
    $url = $api_url . '/v1/oauth2/token';
    $headers = [
        'Accept: application/json',
        'Accept-Language: en_US',
    ];
    $data = [
        'grant_type' => 'client_credentials',
    ];

    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_USERPWD, $client_id . ":" . $client_secret);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    
    $response = curl_exec($ch);
    curl_close($ch);
    
    $result = json_decode($response, true);
    return $result['access_token'];
}

// 创建支付请求
function createPayment($access_token, $api_url) {
    $url = $api_url . '/v1/payments/payment';
    $headers = [
        'Content-Type: application/json',
        'Authorization: Bearer ' . $access_token,
    ];

    // 设置支付信息
    $paymentData = [
        'intent' => 'sale',
        'payer' => [
            'payment_method' => 'paypal',
        ],
        'transactions' => [
            [
                'amount' => [
                    'total' => '10.00',  // 这里设置支付金额
                    'currency' => 'USD', // 设置币种
                ],
                'description' => '支付示例',
            ]
        ],
        'redirect_urls' => [
            'return_url' => 'http://www.ydrbh.com/3.php?success=true',  // 支付成功后的回调URL
            'cancel_url' => 'http://www.ydrbh.com/3.php?cancel=true',  // 支付取消后的回调URL
        ],
    ];

    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($paymentData));
    
    $response = curl_exec($ch);
    curl_close($ch);
    
    return json_decode($response, true);
}

// 获取 Access Token
$access_token = getAccessToken($client_id, $client_secret, $api_url);

// 创建支付
$paymentResponse = createPayment($access_token, $api_url);

// 检查支付请求是否成功，并重定向用户到 PayPal
if (isset($paymentResponse['links'])) {
    foreach ($paymentResponse['links'] as $link) {
        if ($link['rel'] == 'approval_url') {
            // 重定向到 PayPal 的支付页面
            header('Location: ' . $link['href']);
            exit;
        }
    }
}

// 如果没有找到 approval_url，则显示错误信息
echo '支付创建失败，请稍后再试。';



 
?>