<?php
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/**
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* PhalApi_Config_File 文件配置类
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*
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* <li>从配置文件获取参数配置</li>
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*
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* 使用示例：
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* <br>
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* <code>
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* $config = new PhalApi_Config_File('./Config');
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* $config->get('sys.db.user');
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* </code>
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*
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* @package PhalApi\Config
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* @see PhalApi_Config::get()
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* @license http://www.phalapi.net/license GPL 协议
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* @link http://www.phalapi.net/
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* @author dogstar <chanzonghuang@gmail.com> 2014-10-02
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*/
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class PhalApi_Config_File implements PhalApi_Config {
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/**
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* @var string $path 配置文件的目录位置
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*/
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private $path = '';
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/**
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* @var array $map 配置文件的映射表，避免重复加载
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*/
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private $map = array();
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public function __construct($configPath) {
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$this->path = $configPath;
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}
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/**
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* 获取配置
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* 首次获取时会进行初始化
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*
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* @param $key string 配置键值
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* @return mixed 需要获取的配置值
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*/
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public function get($key, $default = NULL) {
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$keyArr = explode('.', $key);
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$fileName = $keyArr[0];
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if (!isset($this->map[$fileName])) {
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$this->loadConfig($fileName);
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}
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$rs = NULL;
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$preRs = $this->map;
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foreach ($keyArr as $subKey) {
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if (!isset($preRs[$subKey])) {
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$rs = NULL;
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break;
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}
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$rs = $preRs[$subKey];
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$preRs = $rs;
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}
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return $rs !== NULL ? $rs : $default;
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}
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/**
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* 加载配置文件
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* 加载保存配置信息数组的config.php文件，若文件不存在，则将$map置为空数组
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*
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* @param string $fileName 配置文件路径
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* @return array 配置文件对应的内容
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*/
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private function loadConfig($fileName) {
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$config = include($this->path . DIRECTORY_SEPARATOR . $fileName . '.php');
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$this->map[$fileName] = $config;
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}
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}
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