获取Paypal账户余额

Question

有没有一种方法可以安全地查询我的贝宝帐户并检索我帐户中的总余额？我想这样做是为了创建一个“我们的每月配额有 y 中的 x”类型的东西。

Answer 1

这是一个您可以使用的示例帮助类：

<?php

class Paypal
{
    /**
     * API Version
     */
    const VERSION = 51.0;

    /**
     * List of valid API environments
     * @var array
     */
    private $allowedEnvs = array(
        'beta-sandbox',
        'live',
        'sandbox'
    );

    /**
     * Config storage from constructor
     * @var array
     */
    private $config = array();

    /**
     * URL storage based on environment
     * @var string
     */
    private $url;

    /**
     * Build PayPal API request
     * 
     * @param string $username
     * @param string $password
     * @param string $signature
     * @param string $environment
     */
    public function __construct($username, $password, $signature, $environment = 'live')
    {
        if (!in_array($environment, $this->allowedEnvs)) {
            throw new Exception('Specified environment is not allowed.');
        }
        $this->config = array(
            'username'    => $username,
            'password'    => $password,
            'signature'   => $signature,
            'environment' => $environment
        );
    }

    /**
     * Make a request to the PayPal API
     * 
     * @param  string $method API method (e.g. GetBalance)
     * @param  array  $params Additional fields to send in the request (e.g. array('RETURNALLCURRENCIES' => 1))
     * @return array
     */
    public function call($method, array $params = array())
    {
        $fields = $this->encodeFields(array_merge(
            array(
                'METHOD'    => $method
                'VERSION'   => self::VERSION,
                'USER'      => $this->config['username'],
                'PWD'       => $this->config['password'],
                'SIGNATURE' => $this->config['signature']
            ),
            $params
        ));
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $this->getUrl());
        curl_setopt($ch, CURLOPT_POST, count($fields));
        curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($fields));
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $response = curl_exec($ch);
        if (!$response) {
            throw new Exception('Failed to contact PayPal API: ' . curl_error($ch) . ' (Error No. ' . curl_errno($ch) . ')');
        }
        curl_close($ch);
        parse_str($response, $result);
        return $this->decodeFields($result);
    }

    /**
     * Prepare fields for API
     * 
     * @param  array  $fields
     * @return array
     */
    private function encodeFields(array $fields)
    {
        return array_map('urlencode', $fields);
    }

    /**
     * Make response readable
     * 
     * @param  array  $fields
     * @return array
     */
    private function decodeFields(array $fields)
    {
        return array_map('urldecode', $fields);
    }

    /**
     * Get API url based on environment
     * 
     * @return string
     */
    private function getUrl()
    {
        if (is_null($this->url)) {
            switch ($this->config['environment']) {
                case 'sandbox':
                case 'beta-sandbox':
                    $this->url = "https://api-3t.$environment.paypal.com/nvp";
                    break;
                default:
                    $this->url = 'https://api-3t.paypal.com/nvp';
            }
        }
        return $this->url;
    }
}

并且可以像这样使用：

<?php

include 'Paypal.php';
$paypal = new Paypal('username', 'password', 'signature');

$response = $paypal->call('GetBalance');

print_r($response);

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