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   1  <?php
   2  
   3  /*
   4   * This file is part of the Symfony package.
   5   *
   6   * (c) Fabien Potencier <fabien@symfony.com>
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Symfony\Component\HttpKernel\DataCollector;
  13  
  14  use Symfony\Component\HttpKernel\DataCollector\Util\ValueExporter;
  15  
  16  /**
  17   * DataCollector.
  18   *
  19   * Children of this class must store the collected data in the data property.
  20   *
  21   * @author Fabien Potencier <fabien@symfony.com>
  22   * @author Bernhard Schussek <bschussek@symfony.com>
  23   */
  24  abstract class DataCollector implements DataCollectorInterface, \Serializable
  25  {
  26      protected $data = array();
  27  
  28      /**
  29       * @var ValueExporter
  30       */
  31      private $valueExporter;
  32  
  33      public function serialize()
  34      {
  35          return serialize($this->data);
  36      }
  37  
  38      public function unserialize($data)
  39      {
  40          $this->data = unserialize($data);
  41      }
  42  
  43      /**
  44       * Converts a PHP variable to a string.
  45       *
  46       * @param mixed $var A PHP variable
  47       *
  48       * @return string The string representation of the variable
  49       */
  50      protected function varToString($var)
  51      {
  52          if (null === $this->valueExporter) {
  53              $this->valueExporter = new ValueExporter();
  54          }
  55  
  56          return $this->valueExporter->exportValue($var);
  57      }
  58  }