(PECL runkit >= 0.7.0)
runkit_method_add — Dynamically adds a new method to a given class
本函数是实验性的。本函数的行为，包括函数名称以及其它任何关于本函数的文档可能会在没有通知的情况下随 PHP 以后的发布而改变。使用本函数风险自担。
The class to which this method will be added
The name of the method to add
Comma-delimited list of arguments for the newly-created method
The code to be evaluated when methodname is called
The type of method to create, can be RUNKIT_ACC_PUBLIC, RUNKIT_ACC_PROTECTED or RUNKIT_ACC_PRIVATE
Note: This parameter is only used as of PHP 5, because, prior to this, all methods were public.
如果成功则返回 TRUE，失败则返回 FALSE。
Example #1 runkit_method_add() example
<?php
class Example {
function foo() {
echo "foo!\n";
}
}
// create an Example object
$e = new Example();
// Add a new public method
runkit_method_add(
'Example',
'add',
'$num1, $num2',
'return $num1 + $num2;',
RUNKIT_ACC_PUBLIC
);
// add 12 + 4
echo $e->add(12, 4);
?>
上例将输出：
16