PayPal\Core\PayPalHttpConnection::execute PHP Method

    public function execute($data)
    {
        //Initialize the logger
        $this->logger->info($this->httpConfig->getMethod() . ' ' . $this->httpConfig->getUrl());
        //Initialize Curl Options
        $ch = curl_init($this->httpConfig->getUrl());
        $options = $this->httpConfig->getCurlOptions();
        if (empty($options[CURLOPT_HTTPHEADER])) {
            unset($options[CURLOPT_HTTPHEADER]);
        }
        curl_setopt_array($ch, $options);
        curl_setopt($ch, CURLOPT_URL, $this->httpConfig->getUrl());
        curl_setopt($ch, CURLOPT_HEADER, true);
        curl_setopt($ch, CURLINFO_HEADER_OUT, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $this->getHttpHeaders());
        //Determine Curl Options based on Method
        switch ($this->httpConfig->getMethod()) {
            case 'POST':
                curl_setopt($ch, CURLOPT_POST, true);
                curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
                break;
            case 'PUT':
            case 'PATCH':
            case 'DELETE':
                curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
                break;
        }
        //Default Option if Method not of given types in switch case
        if ($this->httpConfig->getMethod() != null) {
            curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $this->httpConfig->getMethod());
        }
        //Logging Each Headers for debugging purposes
        foreach ($this->getHttpHeaders() as $header) {
            //TODO: Strip out credentials and other secure info when logging.
            // $this->logger->debug($header);
        }
        //Execute Curl Request
        $result = curl_exec($ch);
        //Retrieve Response Status
        $httpStatus = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        //Retry if Certificate Exception
        if (curl_errno($ch) == 60) {
            $this->logger->info("Invalid or no certificate authority found - Retrying using bundled CA certs file");
            curl_setopt($ch, CURLOPT_CAINFO, dirname(__FILE__) . '/cacert.pem');
            $result = curl_exec($ch);
            //Retrieve Response Status
            $httpStatus = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        }
        //Retry if Failing
        $retries = 0;
        if (in_array($httpStatus, self::$retryCodes) && $this->httpConfig->getHttpRetryCount() != null) {
            $this->logger->info("Got {$httpStatus} response from server. Retrying");
            do {
                $result = curl_exec($ch);
                //Retrieve Response Status
                $httpStatus = curl_getinfo($ch, CURLINFO_HTTP_CODE);
            } while (in_array($httpStatus, self::$retryCodes) && ++$retries < $this->httpConfig->getHttpRetryCount());
        }
        //Throw Exception if Retries and Certificates doenst work
        if (curl_errno($ch)) {
            $ex = new PayPalConnectionException($this->httpConfig->getUrl(), curl_error($ch), curl_errno($ch));
            curl_close($ch);
            throw $ex;
        }
        // Get Request and Response Headers
        $requestHeaders = curl_getinfo($ch, CURLINFO_HEADER_OUT);
        //Using alternative solution to CURLINFO_HEADER_SIZE as it throws invalid number when called using PROXY.
        if (function_exists('mb_strlen')) {
            $responseHeaderSize = mb_strlen($result, '8bit') - curl_getinfo($ch, CURLINFO_SIZE_DOWNLOAD);
            $responseHeaders = mb_substr($result, 0, $responseHeaderSize, '8bit');
            $result = mb_substr($result, $responseHeaderSize, mb_strlen($result), '8bit');
        } else {
            $responseHeaderSize = strlen($result) - curl_getinfo($ch, CURLINFO_SIZE_DOWNLOAD);
            $responseHeaders = substr($result, 0, $responseHeaderSize);
            $result = substr($result, $responseHeaderSize);
        }
        $this->logger->debug("Request Headers \t: " . str_replace("\r\n", ", ", $requestHeaders));
        $this->logger->debug(($data && $data != '' ? "Request Data\t\t: " . $data : "No Request Payload") . "\n" . str_repeat('-', 128) . "\n");
        $this->logger->info("Response Status \t: " . $httpStatus);
        $this->logger->debug("Response Headers\t: " . str_replace("\r\n", ", ", $responseHeaders));
        //Close the curl request
        curl_close($ch);
        //More Exceptions based on HttpStatus Code
        if (in_array($httpStatus, self::$retryCodes)) {
            $ex = new PayPalConnectionException($this->httpConfig->getUrl(), "Got Http response code {$httpStatus} when accessing {$this->httpConfig->getUrl()}. " . "Retried {$retries} times.");
            $ex->setData($result);
            $this->logger->error("Got Http response code {$httpStatus} when accessing {$this->httpConfig->getUrl()}. " . "Retried {$retries} times." . $result);
            $this->logger->debug("\n\n" . str_repeat('=', 128) . "\n");
            throw $ex;
        } elseif ($httpStatus < 200 || $httpStatus >= 300) {
            $ex = new PayPalConnectionException($this->httpConfig->getUrl(), "Got Http response code {$httpStatus} when accessing {$this->httpConfig->getUrl()}.", $httpStatus);
            $ex->setData($result);
            $this->logger->error("Got Http response code {$httpStatus} when accessing {$this->httpConfig->getUrl()}. " . $result);
            $this->logger->debug("\n\n" . str_repeat('=', 128) . "\n");
            throw $ex;
        }
        $this->logger->debug(($result && $result != '' ? "Response Data \t: " . $result : "No Response Body") . "\n\n" . str_repeat('=', 128) . "\n");
        //Return result object
        return $result;
    }

 /**
  * @param array  $handlers Array of handlers
  * @param string $path     Resource path relative to base service endpoint
  * @param string $method   HTTP method - one of GET, POST, PUT, DELETE, PATCH etc
  * @param string $data     Request payload
  * @param array  $headers  HTTP headers
  * @return mixed
  * @throws \PayPal\Exception\PayPalConnectionException
  */
 public function execute($handlers = array(), $path, $method, $data = '', $headers = array())
 {
     $config = $this->apiContext->getConfig();
     $httpConfig = new PayPalHttpConfig(null, $method, $config);
     $headers = $headers ? $headers : array();
     $httpConfig->setHeaders($headers + array('Content-Type' => 'application/json'));
     /** @var \Paypal\Handler\IPayPalHandler $handler */
     foreach ($handlers as $handler) {
         if (!is_object($handler)) {
             $fullHandler = "\\" . (string) $handler;
             $handler = new $fullHandler($this->apiContext);
         }
         $handler->handle($httpConfig, $data, array('path' => $path, 'apiContext' => $this->apiContext));
     }
     $connection = new PayPalHttpConnection($httpConfig, $config);
     $response = $connection->execute($data);
     return $response;
 }