vendor/topthink/framework/src/think/session/driver/File.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2021 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace think\session\driver;

use Closure;
use Exception;
use FilesystemIterator;
use Generator;
use SplFileInfo;
use think\App;
use think\contract\SessionHandlerInterface;

/**
 * Session 文件驱动
 */
class File implements SessionHandlerInterface
{
    protected $config = [
        'path'           => '',
        'expire'         => 1440,
        'prefix'         => '',
        'data_compress'  => false,
        'gc_probability' => 1,
        'gc_divisor'     => 100,
    ];

    public function __construct(App $app, array $config = [])
    {
        $this->config = array_merge($this->config, $config);

        if (empty($this->config['path'])) {
            $this->config['path'] = $app->getRuntimePath() . 'session' . DIRECTORY_SEPARATOR;
        } elseif (substr($this->config['path'], -1) != DIRECTORY_SEPARATOR) {
            $this->config['path'] .= DIRECTORY_SEPARATOR;
        }

        $this->init();
    }

    /**
     * 打开Session
     * @access protected
     * @throws Exception
     */
    protected function init(): void
    {
        try {
            !is_dir($this->config['path']) && mkdir($this->config['path'], 0755, true);
        } catch (\Exception $e) {
            // 写入失败

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