Get balance of Paypal account - API

I want a webpage where I can view more that 1 paypal account balance on line this must use paypal API get balance eg. <?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': $this->url = "https://api-3t.$[login to view URL]"; break; default: $this->url = '[login to view URL]'; } } return $this->url; } }