<?php
  
  namespace Guzzle\Http\Curl;
  
  /**
   * Class used for querying curl_version data
   */
  class CurlVersion
  {
      /** @var array curl_version() information */
      protected $version;
  
      /** @var CurlVersion */
      protected static $instance;
  
      /** @var string Default user agent */
      protected $userAgent;
  
      /**
       * @return CurlVersion
       */
      public static function getInstance()
      {
          if (!self::$instance) {
              self::$instance = new self();
          }
  
          return self::$instance;
      }
  
      /**
       * Get all of the curl_version() data
       *
       * @return array
       */
      public function getAll()
      {
          if (!$this->version) {
              $this->version = curl_version();
          }
  
          return $this->version;
      }
  
      /**
       * Get a specific type of curl information
       *
       * @param string $type Version information to retrieve. This value is one of:
       *     - version_number:     cURL 24 bit version number
       *     - version:            cURL version number, as a string
       *     - ssl_version_number: OpenSSL 24 bit version number
       *     - ssl_version:        OpenSSL version number, as a string
       *     - libz_version:       zlib version number, as a string
       *     - host:               Information about the host where cURL was built
       *     - features:           A bitmask of the CURL_VERSION_XXX constants
       *     - protocols:          An array of protocols names supported by cURL
       *
       * @return string|float|bool if the $type is found, and false if not found
       */
      public function get($type)
      {
          $version = $this->getAll();
  
          return isset($version[$type]) ? $version[$type] : false;
      }
  }