PHPCMS配置文件的读取

<span>//</span><span>1.定义PHPCMS根目录(入口文件所在目录)，PHPCMS_PATH全局可用</span>
<span>define</span>('PHPCMS_PATH', <span>dirname</span>(<span>__FILE__</span>).<span>DIRECTORY_SEPARATOR)

</span><span>//</span><span>2.引入框架入口文件(与入口文件同级的框架目录phpcms中的base.php)</span>
<span>include</span> PHPCMS_PATH.'/phpcms/base.php'<span>;

</span><span>//</span><span>3.调用框架入口文件中基类pc_base的静态方法create_app()，进行应用程序初始化</span>
pc_base::create_app();

    /** <br />     * 加载配置文件 <br />     * @param string $file　　 配置文件 <br />     * @param string $key　　　要获取的配置键 <br />     * @param string $default 默认配置。当获取配置项目失败时该值发生作用。 <br />     * @param boolean $reload 强制重新加载。 <br />     */<br /><span>　　public</span> <span>static</span> <span>function</span> load_config(<span>$file</span>, <span>$key</span> = '', <span>$default</span> = '', <span>$reload</span> = <span>false</span><span>) {　</span>
        <span>static</span> <span>$configs</span> = <span>array</span><span>();　　　　　　　　　　<span><span>//<span># 定义存放配置值的空数组</span></span></span><br /><br /></span>　　　　//-----------------------------------------
        <span>if</span> (!<span>$reload</span> && <span>isset</span>(<span>$configs</span>[<span>$file</span><span>])) {　<span>//<span># 如果重新加载 且 设置了$configs[$file]（这里不执行）</span></span></span>
            <span>if</span> (<span>empty</span>(<span>$key</span><span>)) {</span>
                <span>return</span> <span>$configs</span>[<span>$file</span><span>];　　　　　　　<span>//<span># <span><span><span>如果配置键为空，返回整个配置数组（配置文件以一维数组形式返回，如：return array('a'=>'','b'=>'')）</span></span></span></span></span>
            } </span><span>elseif</span> (<span>isset</span>(<span>$configs</span>[<span>$file</span>][<span>$key</span><span>])) { </span>
                <span>return</span> <span>$configs</span>[<span>$file</span>][<span>$key</span><span>];　　　 <span><span>//<span># 如果设置了有配置键的值，返回</span></span></span>
            } </span><span>else</span><span> {</span>
                <span>return</span> <span>$default</span><span>;　　　　　　　　　　　<span><span>//<span># 默认返回配置default</span></span></span>
            }
        }<br />　　　　//-----------------------------------------
</span>
        <span>$path</span> = CACHE_PATH.'configs'.DIRECTORY_SEPARATOR.<span>$file</span>.'.php'<span>;<span>//<span># 系统配置文件路径，$path = PHPCMS_PATH.'caches/configs/system.php';</span></span></span>
        <span>if</span> (<span>file_exists</span>(<span>$path</span><span>)) {</span>
            <span>$configs</span>[<span>$file</span>] = <span>include</span> <span>$path</span><span>;　　　　<span><span><span>//<span># 如果system配置文件存在，引入</span></span></span></span>
        }
       </span>
        <span>if</span> (<span>empty</span>(<span>$key</span><span>)) {　　　　　　　　　　　　　　 <span><span><span><span>//<span># 根据$key取配置值，否则返回default值，同上虚线间代码</span></span></span></span></span></span>
            <span>return</span> <span>$configs</span>[<span>$file</span><span>];
        } </span><span>elseif</span> (<span>isset</span>(<span>$configs</span>[<span>$file</span>][<span>$key</span><span>])) {</span>
            <span>return</span> <span>$configs</span>[<span>$file</span>][<span>$key</span><span>];
        } </span><span>else</span><span> {</span>
            <span>return</span> <span>$default</span><span>;
        }
    }</span>