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    <h3>Editing: DataCollector.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

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

namespace Symfony\Component\HttpKernel\DataCollector;

use Symfony\Component\VarDumper\Caster\CutStub;
use Symfony\Component\VarDumper\Caster\ReflectionCaster;
use Symfony\Component\VarDumper\Cloner\ClonerInterface;
use Symfony\Component\VarDumper\Cloner\Data;
use Symfony\Component\VarDumper\Cloner\Stub;
use Symfony\Component\VarDumper\Cloner\VarCloner;

/**
 * DataCollector.
 *
 * Children of this class must store the collected data in the data property.
 *
 * @author Fabien Potencier &lt;fabien@symfony.com&gt;
 * @author Bernhard Schussek &lt;bschussek@symfony.com&gt;
 */
abstract class DataCollector implements DataCollectorInterface
{
    /**
     * @var array|Data
     */
    protected $data = [];

    /**
     * @var ClonerInterface
     */
    private $cloner;

    /**
     * Converts the variable into a serializable Data instance.
     *
     * This array can be displayed in the template using
     * the VarDumper component.
     *
     * @param mixed $var
     *
     * @return Data
     */
    protected function cloneVar($var)
    {
        if ($var instanceof Data) {
            return $var;
        }
        if (null === $this-&gt;cloner) {
            $this-&gt;cloner = new VarCloner();
            $this-&gt;cloner-&gt;setMaxItems(-1);
            $this-&gt;cloner-&gt;addCasters($this-&gt;getCasters());
        }

        return $this-&gt;cloner-&gt;cloneVar($var);
    }

    /**
     * @return callable[] The casters to add to the cloner
     */
    protected function getCasters()
    {
        $casters = [
            '*' =&gt; function ($v, array $a, Stub $s, $isNested) {
                if (!$v instanceof Stub) {
                    foreach ($a as $k =&gt; $v) {
                        if (\is_object($v) &amp;&amp; !$v instanceof \DateTimeInterface &amp;&amp; !$v instanceof Stub) {
                            $a[$k] = new CutStub($v);
                        }
                    }
                }

                return $a;
            },
        ] + ReflectionCaster::UNSET_CLOSURE_FILE_INFO;

        return $casters;
    }

    /**
     * @return array
     */
    public function __sleep()
    {
        return ['data'];
    }

    public function __wakeup()
    {
    }

    /**
     * @internal to prevent implementing \Serializable
     */
    final protected function serialize()
    {
    }

    /**
     * @internal to prevent implementing \Serializable
     */
    final protected function unserialize($data)
    {
    }
}
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