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Detailed explanation of ThinkPHP behavioral extensions and plug-ins
Detailed explanation of ThinkPHP behavioral extensions and plug-ins
本文主要介绍了ThinkPHP中的行为扩展和插件原理分析、ThinkPHP中的行为、自定义行为、自定义插件等，给大家提供参考，希望对大家有所帮助。
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
<?phpnamespace 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：
<?phpnamespace 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 
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
<?phpnamespace 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：
<?phpnamespace 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
相关推荐：
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