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

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2016 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

namespace think\log\driver;

use think\App;

/**
 * 本地化调试输出到文件
 */
class File
{
    protected $config = [
        'time_format' => 'c',
        'single'      => false,
        'file_size'   => 2097152,
        'path'        => '',
        'apart_level' => [],
        'max_files'   => 0,
        'json'        => false,
    ];

    protected $app;

    // 实例化并传入参数
    public function __construct(App $app, $config = [])
    {
        $this->app = $app;

        if (is_array($config)) {
            $this->config = array_merge($this->config, $config);
        }

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

    /**
     * 日志写入接口
     * @access public
     * @param  array    $log    日志信息
     * @param  bool     $append 是否追加请求信息
     * @return bool
     */
    public function save(array $log = [], $append = false)
    {
        $destination = $this->getMasterLogFile();

        $path = dirname($destination);