symfony/src/Symfony/Component/HttpKernel/DataCollector/DataCollector.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\HttpKernel\DataCollector;

/**
 * DataCollector.
 *
 * Children of this class must store the collected data in the data property.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
abstract class DataCollector implements DataCollectorInterface, \Serializable
{
    protected $data;

    public function serialize()
    {
        return serialize($this->data);
    }

    public function unserialize($data)
    {
        $this->data = unserialize($data);
    }

    /**
     * Converts a PHP variable to a string.
     *
     * @param mixed $var A PHP variable
     *
     * @return string The string representation of the variable
     */
    protected function varToString($var)
    {
        if (is_object($var)) {
            return sprintf('Object(%s)', get_class($var));
        }

        if (is_array($var)) {
            $a = array();
            foreach ($var as $k => $v) {
                $a[] = sprintf('%s => %s', $k, $this->varToString($v));
            }

            return sprintf("Array(%s)", implode(', ', $a));
        }

        if (is_resource($var)) {
            return sprintf('Resource(%s)', get_resource_type($var));
        }

        if (null === $var) {
            return 'null';
        }

        if (false === $var) {
            return 'false';
        }

        if (true === $var) {
            return 'true';
        }

        return (string) $var;
    }
}