PHP钩子系统
jerry thinkphp 2015年11月18日
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实现类似于wordpress中的钩子的类：
class Hook
{
//action hooks array
private static $actions = array();
/**
* ads a function to an action hook
* @param $hook
* @param $function
*/
public static function add_action($hook,$function)
{
$hook=mb_strtolower($hook,CHARSET);
// create an array of function handlers if it doesn't already exist
if(!self::exists_action($hook))
{
self::$actions[$hook] = array();
}
// append the current function to the list of function handlers
if (is_callable($function))
{
self::$actions[$hook][] = $function;
return TRUE;
}
return FALSE ;
}
/**
* executes the functions for the given hook
* @param string $hook
* @param array $params
* @return boolean true if a hook was setted
*/
public static function do_action($hook,$params=NULL)
{
$hook=mb_strtolower($hook,CHARSET);
if(isset(self::$actions[$hook]))
{
// call each function handler associated with this hook
foreach(self::$actions[$hook] as $function)
{
if (is_array($params))
{
call_user_func_array($function,$params);
}
else
{
call_user_func($function);
}
//cant return anything since we are in a loop! dude!
}
return TRUE;
}
return FALSE;
}
/**
* gets the functions for the given hook
* @param string $hook
* @return mixed
*/
public static function get_action($hook)
{
$hook=mb_strtolower($hook,CHARSET);
return (isset(self::$actions[$hook]))? self::$actions[$hook]:FALSE;
}
/**
* check exists the functions for the given hook
* @param string $hook
* @return boolean
*/
public static function exists_action($hook)
{
$hook=mb_strtolower($hook,CHARSET);
return (isset(self::$actions[$hook]))? TRUE:FALSE;
}
}
/**
* Hooks Shortcuts not in class
*/
function add_action($hook,$function)
{
return Hook::add_action($hook,$function);
}
function do_action($hook)
{
return Hook::do_action($hook);
}//添加钩子
Hook::add_action('unique_name_hook','some_class::hook_test');
//或使用快捷函数添加钩子:
add_action('unique_name_hook','other_class::hello');
add_action('unique_name_hook','some_public_function');
//执行钩子
do_action('unique_name_hook');//也可以使用 Hook::do_action();推荐文章
