thinkphp/library/think/cache/driver/File.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

namespace think\cache\driver;

use think\cache\Driver;

/**
 * 文件类型缓存类
 * @author    liu21st <liu21st@gmail.com>
 */
class File extends Driver
{
    protected $options = [
        'expire'        => 0,
        'cache_subdir'  => true,
        'prefix'        => '',
        'path'          => CACHE_PATH,
        'data_compress' => false,
    ];

    protected $expire;

    /**
     * 构造函数
     * @param array $options
     */
    public function __construct($options = [])
    {
        if (!empty($options)) {
            $this->options = array_merge($this->options, $options);
        }
        if (substr($this->options['path'], -1) != DS) {
            $this->options['path'] .= DS;
        }
        $this->init();
    }

    /**
     * 初始化检查
     * @access private
     * @return boolean
     */
    private function init()
    {
        // 创建项目缓存目录
        if (!is_dir($this->options['path'])) {
            if (mkdir($this->options['path'], 0755, true)) {
                return true;
            }
        }
        return false;