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    <h3>Editing: Profiler.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\Profiler;

use Psr\Log\LoggerInterface;
use Symfony\Component\HttpFoundation\Exception\ConflictingHeadersException;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\DataCollector\DataCollectorInterface;
use Symfony\Component\HttpKernel\DataCollector\LateDataCollectorInterface;
use Symfony\Contracts\Service\ResetInterface;

/**
 * Profiler.
 *
 * @author Fabien Potencier &lt;fabien@symfony.com&gt;
 */
class Profiler implements ResetInterface
{
    private $storage;

    /**
     * @var DataCollectorInterface[]
     */
    private $collectors = [];

    private $logger;
    private $initiallyEnabled = true;
    private $enabled = true;

    public function __construct(ProfilerStorageInterface $storage, ?LoggerInterface $logger = null, bool $enable = true)
    {
        $this-&gt;storage = $storage;
        $this-&gt;logger = $logger;
        $this-&gt;initiallyEnabled = $this-&gt;enabled = $enable;
    }

    /**
     * Disables the profiler.
     */
    public function disable()
    {
        $this-&gt;enabled = false;
    }

    /**
     * Enables the profiler.
     */
    public function enable()
    {
        $this-&gt;enabled = true;
    }

    /**
     * Loads the Profile for the given Response.
     *
     * @return Profile|null
     */
    public function loadProfileFromResponse(Response $response)
    {
        if (!$token = $response-&gt;headers-&gt;get('X-Debug-Token')) {
            return null;
        }

        return $this-&gt;loadProfile($token);
    }

    /**
     * Loads the Profile for the given token.
     *
     * @return Profile|null
     */
    public function loadProfile(string $token)
    {
        return $this-&gt;storage-&gt;read($token);
    }

    /**
     * Saves a Profile.
     *
     * @return bool
     */
    public function saveProfile(Profile $profile)
    {
        // late collect
        foreach ($profile-&gt;getCollectors() as $collector) {
            if ($collector instanceof LateDataCollectorInterface) {
                $collector-&gt;lateCollect();
            }
        }

        if (!($ret = $this-&gt;storage-&gt;write($profile)) &amp;&amp; null !== $this-&gt;logger) {
            $this-&gt;logger-&gt;warning('Unable to store the profiler information.', ['configured_storage' =&gt; \get_class($this-&gt;storage)]);
        }

        return $ret;
    }

    /**
     * Purges all data from the storage.
     */
    public function purge()
    {
        $this-&gt;storage-&gt;purge();
    }

    /**
     * Finds profiler tokens for the given criteria.
     *
     * @param int|null    $limit The maximum number of tokens to return
     * @param string|null $start The start date to search from
     * @param string|null $end   The end date to search to
     *
     * @return array
     *
     * @see https://php.net/datetime.formats for the supported date/time formats
     */
    public function find(?string $ip, ?string $url, ?int $limit, ?string $method, ?string $start, ?string $end, ?string $statusCode = null)
    {
        return $this-&gt;storage-&gt;find($ip, $url, $limit, $method, $this-&gt;getTimestamp($start), $this-&gt;getTimestamp($end), $statusCode);
    }

    /**
     * Collects data for the given Response.
     *
     * @return Profile|null
     */
    public function collect(Request $request, Response $response, ?\Throwable $exception = null)
    {
        if (false === $this-&gt;enabled) {
            return null;
        }

        $profile = new Profile(substr(hash('sha256', uniqid(mt_rand(), true)), 0, 6));
        $profile-&gt;setTime(time());
        $profile-&gt;setUrl($request-&gt;getUri());
        $profile-&gt;setMethod($request-&gt;getMethod());
        $profile-&gt;setStatusCode($response-&gt;getStatusCode());
        try {
            $profile-&gt;setIp($request-&gt;getClientIp());
        } catch (ConflictingHeadersException $e) {
            $profile-&gt;setIp('Unknown');
        }

        if ($prevToken = $response-&gt;headers-&gt;get('X-Debug-Token')) {
            $response-&gt;headers-&gt;set('X-Previous-Debug-Token', $prevToken);
        }

        $response-&gt;headers-&gt;set('X-Debug-Token', $profile-&gt;getToken());

        foreach ($this-&gt;collectors as $collector) {
            $collector-&gt;collect($request, $response, $exception);

            // we need to clone for sub-requests
            $profile-&gt;addCollector(clone $collector);
        }

        return $profile;
    }

    public function reset()
    {
        foreach ($this-&gt;collectors as $collector) {
            $collector-&gt;reset();
        }
        $this-&gt;enabled = $this-&gt;initiallyEnabled;
    }

    /**
     * Gets the Collectors associated with this profiler.
     *
     * @return array
     */
    public function all()
    {
        return $this-&gt;collectors;
    }

    /**
     * Sets the Collectors associated with this profiler.
     *
     * @param DataCollectorInterface[] $collectors An array of collectors
     */
    public function set(array $collectors = [])
    {
        $this-&gt;collectors = [];
        foreach ($collectors as $collector) {
            $this-&gt;add($collector);
        }
    }

    /**
     * Adds a Collector.
     */
    public function add(DataCollectorInterface $collector)
    {
        $this-&gt;collectors[$collector-&gt;getName()] = $collector;
    }

    /**
     * Returns true if a Collector for the given name exists.
     *
     * @param string $name A collector name
     *
     * @return bool
     */
    public function has(string $name)
    {
        return isset($this-&gt;collectors[$name]);
    }

    /**
     * Gets a Collector by name.
     *
     * @param string $name A collector name
     *
     * @return DataCollectorInterface
     *
     * @throws \InvalidArgumentException if the collector does not exist
     */
    public function get(string $name)
    {
        if (!isset($this-&gt;collectors[$name])) {
            throw new \InvalidArgumentException(sprintf('Collector &quot;%s&quot; does not exist.', $name));
        }

        return $this-&gt;collectors[$name];
    }

    private function getTimestamp(?string $value): ?int
    {
        if (null === $value || '' === $value) {
            return null;
        }

        try {
            $value = new \DateTime(is_numeric($value) ? '@'.$value : $value);
        } catch (\Exception $e) {
            return null;
        }

        return $value-&gt;getTimestamp();
    }
}
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