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mixed call_user_method_array     ( string $method_name    , object &$obj    , array $paramarr    )´ÓÓû§¶¨ÒåµÄ obj ¶ÔÏóÖе÷Óàmethod_name ËùÖ¸µÄ·½·¨£¬Í¬Ê±Ê¹Óàparamarr ÖеIJÎÊý¡£
mixed call_user_method ( string method_name, object &obj  [, mixed parameter [, mixed ...]] )ÀàËÆcall_user_method_array,
mixed call_user_func_array ( string $callback_function, array  param_arr )´Óµ÷ÓÃcallback_function£¬²¢Ê¹ÓÃparam_arrÖеIJÎÊý
mixed call_user_func ( callback function [, mixed  parameter [, mixed ...]] )µÚÒ»¸ö²ÎÊýÖ¸¶¨Á˵÷Óõĺ¯ÊýÃû£¬ºóÃæÊDz»ÏÞ¸öÊý£¬²»ÏÞ¸ñʽµÄ²ÎÊý¶ÓÁС£
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// Type 1: Simple callback
call_user_func(‘my_callback_function’);// Type 2: Static class method call
call_user_func(array(‘MyClass’, ‘myCallbackMethod’));
// Type 3: Object method call
$obj = new MyClass();
call_user_func(array($obj, ‘myCallbackMethod’));
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     class_exists — 檢²é類別ÊÇ·ñÒÑ經¶¨義
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     get_class_vars — 傳»Ø類別預設µÄ屬ÐÔ
     get_class — 傳»ØÎï¼þµÄ類別Ãû稱
     get_declared_classes — 傳»Ø聲Ã÷µÄ類別µÄÃû稱
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