runkit_method_redefine
(PECL runkit >= 0.7.0)
runkit_method_redefine — Dynamically changes the code of the given method
说明
$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。
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
methodnameis called -
flags -
The redefined method can be
RUNKIT_ACC_PUBLIC,RUNKIT_ACC_PROTECTEDorRUNKIT_ACC_PRIVATEoptionally combined via bitwise OR withRUNKIT_ACC_STATIC(since 1.0.1)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_method_add() - Dynamically adds a new method to a given class
- runkit_method_copy() - Copies a method from class to another
- runkit_method_remove() - Dynamically removes the given method
- runkit_method_rename() - Dynamically changes the name of the given method
- runkit_function_redefine() - Replace a function definition with a new implementation
用户评论:
[#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.