Reading PHPCMS configuration file_PHP tutorial

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PHPCMS’s entry file index.php contains less code and mainly does three things, as follows:

<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();

Although the code is small, after loading the framework entry file base.php that does a lot of things, it is equivalent to directly entering the core of PHPCMS.

--------------------------@chenwei Black-eyed Poet------- ------------------

Let’s briefly talk about the main things base.php does:

1. Define a series of constants, such as framework path, cache folder path, etc., which are globally available.

2. The loading framework comes with its own function library, which is available globally.

3. By reading the configuration file, define the configuration value as a constant, which is globally available.

4. Comes with the PHPCMS base class (pc_base), which defines methods for loading system classes, application classes, data models, system function libraries, application function libraries, plug-in class libraries, plug-in data models, configuration files, etc.

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

The above defines the CSS path as a constant for global use in the front and backend, so how does it load the configuration file, as follows:

    /** <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>

So when using load_config(), you only need to pass in the configuration file name and configuration key to obtain the configuration value; generally, the principle of obtaining configuration items is similar.

http://www.bkjia.com/PHPjc/822274.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/822274.htmlTechArticle------------------------ -------------------------------------------------- -------------------------- The entry file index.php of PHPCMS has less code. It mainly does three things, as follows:...