classkit_method_add

(PECL classkit >= 0.1)

classkit_method_add — Dynamically adds a new method to a given class

说明

bool classkit_method_add ( string $classname , string $methodname , string $args , string $code [, int $flags = CLASSKIT_ACC_PUBLIC ] )

Warning

此函数是实验性的。此函数的表象，包括名称及其相关文档都可能在未来的 PHP 发布版本中未通知就被修改。使用本函数风险自担。

参数

classname: The class to which this method will be added
methodname: The name of the method to add
args: Comma-delimited list of arguments for the newly-created method
code: The code to be evaluated when methodname is called
flags: The type of method to create, can be CLASSKIT_ACC_PUBLIC , CLASSKIT_ACC_PROTECTED or CLASSKIT_ACC_PRIVATE

Note:

This parameter is only used as of PHP 5, because, prior to this, all methods were public.

返回值

成功时返回 TRUE ，或者在失败时返回 FALSE 。

范例

Example #1 classkit_method_add() example

  <?php
 class  Example  {
    function  foo () {
        echo  "foo!\n" ;
    }
}

 // create an Example object
 $e  = new  Example ();

 // Add a new public method
 classkit_method_add (
     'Example' ,
     'add' ,
     '$num1, $num2' ,
     'return $num1 + $num2;' ,
     CLASSKIT_ACC_PUBLIC
 );

 // add 12 + 4
 echo  $e -> add ( 12 ,  4 );
 ?>

以上例程会输出：

参见

classkit_method_copy() - Copies a method from class to another
classkit_method_redefine() - Dynamically changes the code of the given method
classkit_method_remove() - Dynamically removes the given method
classkit_method_rename() - Dynamically changes the name of the given method
create_function() - Create an anonymous (lambda-style) function

用户评论:

[#1] Lester [2008-04-03 09:54:04]

If you creates methods by using classkit_method_add(), they are not visible in get_class_methods().

class A
{
       public function foo()
       {
         return "foo!\n";
       }
}

classkit_method_redefine('A','bar','','return "bar !\n";',CLASSKIT_ACC_PUBLIC);

print_r(get_class_methods('A'));
// writes only "foo"