classkit_method_redefine

(PECL classkit >= 0.1)

classkit_method_redefine — Dynamically changes the code of the given method

说明

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

Note: 此函数不能用来操作当前正常运行（或运行链上）的方法。

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 in which to redefine the method

methodname

The name of the method to redefine

args

Comma-delimited list of arguments for the redefined method

code

The new code to be evaluated when methodname is called

flags

The redefined method 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_redefine() example

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

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

// output Example::foo() (before redefine)
echo "Before: " . $e->foo();

// Redefine the 'foo' method
classkit_method_redefine(
    'Example',
    'foo',
    '',
    'return "bar!\n";',
    CLASSKIT_ACC_PUBLIC
);

// output Example::foo() (after redefine)
echo "After: " . $e->foo();
?>

以上例程会输出：

Before: foo!
After: bar!

参见

User Contributed Notes

fdrean 03-Sep-2016 09:22
This could lead to revolution in cli mode now that developers can load new code without restarting process.