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(PECL runkit >= 0.7.0)
runkit_method_redefine — Dynamically changes the code of the given method
$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。
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
optionally combined via bitwise OR with
RUNKIT_ACC_STATIC
(since 1.0.1)
Note:
This parameter is only used as of PHP 5, because, prior to this, all methods were public.
成功时返回 TRUE
, 或者在失败时返回 FALSE
。
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!
[#1] 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));
?>
[#2] 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.