Home > php教程 > php手册 > PHPCMS配置文件的读取

PHPCMS配置文件的读取

WBOY
Release: 2016-06-13 09:32:24
Original
953 people have browsed it

---------------------------------------------------------------------------------------------------

PHPCMS的入口文件index.php里的代码较少,主要做了三件事,如下:

<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();
Copy after login

代码虽少,但是将 做了很多事的框架入口文件base.php加载进来后,等于直接就进入了PHPCMS的核心。

---------------------------@chenwei 黑眼诗人 ---------------------------

简单说下base.php主要做的事:

1.定义一系列常量,如框架路径,缓存文件夹路径等,全局可用。

2.加载框架自带函数库,全局可用。

3.通过读取配置文件,将配置值定义为常量,全局可用。

4.自带PHPCMS基类(pc_base),定义了加载系统类,应用类,数据模型,系统函数库,应用函数库,插件类库,插件数据模型,配置文件等的方法。

define('CSS_PATH', pc_base::load_config('system', 'css_path'));

上面定义了CSS路径为常量,以便 前后台的全局使用,那它是如何加载配置文件的,如下方法:

    /** <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>
Copy after login

 所以在使用load_config()时,只需传入配置文件名 和 配置键,即可获取配置值; 一般获取配置项的原理类似。

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Recommendations
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template