vendor/maximebf/debugbar/src/DebugBar/Storage/FileStorage.php

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<?php
/*
 * This file is part of the DebugBar package.
 *
 * (c) 2013 Maxime Bouroumeau-Fuseau
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace DebugBar\Storage;

/**
 * Stores collected data into files
 */
class FileStorage implements StorageInterface
{
    protected $dirname;

    /**
     * @param string $dirname Directories where to store files
     */
    public function __construct($dirname)
    {
        $this->dirname = rtrim($dirname, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR;
    }

    /**
     * {@inheritdoc}
     */
    public function save($id, $data)
    {
        if (!file_exists($this->dirname)) {
            mkdir($this->dirname, 0777, true);
        }
        file_put_contents($this->makeFilename($id), json_encode($data));
    }

    /**
     * {@inheritdoc}
     */
    public function get($id)
    {
        return json_decode(file_get_contents($this->makeFilename($id)), true);
    }

    /**
     * {@inheritdoc}
     */
    public function find(array $filters = array(), $max = 20, $offset = 0)
    {
        //Loop through all .json files and remember the modified time and id.
        $files = array();
        foreach (new \DirectoryIterator($this->dirname) as $file) {
            if ($file->getExtension() == 'json') {
                $files[] = array(
                    'time' => $file->getMTime(),
                    'id' => $file->getBasename('.json')
                );
            }