runkit 函数
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runkit_method_redefine

(PECL runkit >= 0.7.0)

runkit_method_redefineDynamically changes the code of the given method

说明

bool runkit_method_redefine ( string $classname , string $methodname , string $args , string $code [, int $flags = RUNKIT_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 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.

返回值

成功时返回 TRUE, 或者在失败时返回 FALSE

范例

Example #1 runkit_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
runkit_method_redefine(
    
'Example',
    
'foo',
    
'',
    
'return "bar!\n";',
    
RUNKIT_ACC_PUBLIC
);

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

以上例程会输出:

Before: foo!
After: bar!

参见


runkit 函数
在线手册:中文  英文

用户评论:

lauri dot piisang at cashongo dot co dot uk (2012-06-15 14:07:17)

A sample implementation of redefining a public static method of symfony's sfDate to 'travel in time' with runkit:
<?php
//Going back in time 3 days
$subtractablePeriod 3;
runkit_method_redefine('sfDateTimeToolkit''now''''return strtotime("-'.$subtractablePeriod.' days");', (RUNKIT_ACC_PUBLIC RUNKIT_ACC_STATIC));    

//Do Stuff here that would otherwise get the current date

//Return to realtime
runkit_method_redefine('sfDateTimeToolkit''now''''return time();', (RUNKIT_ACC_PUBLIC RUNKIT_ACC_STATIC));
?>

anton at bondarenko.cc (2012-02-10 12:38:37)

In last runkit versions you can also use RUNKIT_ACC_STATIC constant as flags parametr to redifine static function.

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