Behavioral extensions and plug-ins in ThinkPHP
下面为大家带来一篇老生常谈ThinkPHP中的行为扩展和插件(推荐)。小挺不错的,现在就分享给大家,也给大家做个参考。
原理分析
将标签与类之间的对应关系(如'app_init'=>array('Common\Behavior\InitHook')),通过Hook类中import或add方法,加载到Hook类中静态变量$tags中。当执行Hook中静态方法listen或者exec方法的时候(listen方法中调用了exec),实例化标签对应的类,调用相应的方法(如果是插件,调用传递的方法,如果是行为,调用run方法)。
Hook中exec方法定义如下:
static public function exec($name, $tag,&$params=NULL) { if(false === strpos($name,'\\')) { // 插件(多个入口) $class = "Addons\\{$name}\\{$name}Addon"; }else{ // 行为扩展(只有一个run入口方法) $class = $name.'Behavior'; $tag = 'run'; } $addon = new $class(); return $addon->$tag($params); }
ThinkPHP中的行为
加载标签与类之间的对应关系
// 加载模式行为定义 if(isset($mode['tags'])) { Hook::import(is_array($mode['tags'])?$mode['tags']:include $mode['tags']); } // 加载应用行为定义 if(is_file(CONF_PATH.'tags.php')) // 允许应用增加开发模式配置定义 Hook::import(include CONF_PATH.'tags.php');
模式行为对应关系
在ThinkPHP/Mode/common.php中tags标签中定义
'tags' => array( 'app_begin' => array( 'Behavior\ReadHtmlCache', // 读取静态缓存 ), 'app_end' => array( 'Behavior\ShowPageTrace', // 页面Trace显示 ), 'view_parse' => array( 'Behavior\ParseTemplate', // 模板解析 支持PHP、内置模板引擎和第三方模板引擎 ), 'template_filter'=> array( 'Behavior\ContentReplace', // 模板输出替换 ), 'view_filter' => array( 'Behavior\WriteHtmlCache', // 写入静态缓存 ), )
应用行为对应关系
在Application/Common/Conf/tags.php中定义
调用相应的行为
如Hook::listen('app_begin')相当于调用Behavior\ReadHtmlCache中的run方法。找到该类,可以查看其对应的run方法如下
自定义行为
1.在Application/Common/Conf/tags.php中添加对应关系
'dqs_behavior'=>array('Common\Behavior\Dqs')
将对应关系添加到tags.php,程序会自动将其加载到Hook的$tags变量中,当然也可通过使用Hook中的add方法手动加载。
2.定义Common\Behavior\DqsBehavior类
<?php namespace Common\Behavior; use Think\Behavior; defined('THINK_PATH') or exit(); class DqsBehavior extends Behavior { public function run(&$content){ echo '<pre class="brush:php;toolbar:false">'; print_r('调用了行为Dqs'); echo ''; } }
其中Behavior 类为ThinkPHP自带的抽象类
3.调用行为
效果如下图
自定义插件
1.定义插件文件
通过查看Hook文件中插件类实例化方式($class = "Addons\\{$name}\\{$name}Addon";),可以得知,如果想定义一个名为Dqs的插件,应该在Addons/Dqs目录下定义DqsAddon.class.php文件。程序如下:
<?php namespace Addons\Dqs; class DqsAddon{ public $info = array( 'name'=>'Editor', 'title'=>'dqs测试插件', 'description'=>'主要用于输出', 'status'=>1, 'author'=>'lidequan', 'version'=>'0.1' ); public function dqsTrace($pa){ echo '<pre class="brush:php;toolbar:false">'; print_r($pa); echo ''; } }
2.注册插件
所谓的注册插件,就是将插件的标签与类之间的对应关系,添加到Hook类中静态变量$tags中。对应行为来说,标识符仅仅是一个标识符,可以定义任意的标识符,但是对应插件来说,标识符不能随意定义,因为插件的标识符代表的是插件的方法名。所以上面的插件注册代码如下
\Think\Hook::add('dqsTrace',array('Dqs'));
3.调用插件
$params=array('name'=>'dqs'); \Think\Hook::listen('dqsTrace',$params);
效果如下
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