runkit_function_redefine
(PECL runkit >= 0.7.0)
runkit_function_redefine — Replace a function definition with a new implementation
说明
runkit_function_redefine (
string
$funcname
,
string $arglist
,
string $code
[,
bool $return_by_reference
= NULL
[,
string $doc_comment
= NULL
]] ) :
bool
runkit_function_redefine (
string
$funcname
,
Closure $closure
[,
string $doc_comment
= NULL
] ) :
bool
Note: 默认情况下,仅在用户空间可删除,重命名,或者修改函数。为了覆盖内部函数,必须启用 php.ini 中的 runkit.internal_override 设置。
参数
-
funcname
-
Name of function to redefine
-
arglist
-
New list of arguments to be accepted by function
-
code
-
New code implementation
-
closure
-
A closure that defines the function.
-
return_by_reference
-
Whether the function should return by reference.
-
doc_comment
-
The doc comment of the function.
返回值
成功时返回 TRUE
, 或者在失败时返回 FALSE
。
更新日志
版本 | 说明 |
---|---|
runkit 1.0.4 | An alternative syntax expecting a closure has been added. |
runkit 1.0.4 | The optional parameters return_by_reference and doc_comment have been added. |
范例
Example #1 A runkit_function_redefine() example
<?php
function testme() {
echo "Original Testme Implementation\n";
}
testme();
runkit_function_redefine('testme','','echo "New Testme Implementation\n";');
testme();
?>
以上例程会输出:
Original Testme Implementation New Testme Implementation
参见
- runkit_function_add() - Add a new function, similar to create_function
- runkit_function_copy() - Copy a function to a new function name
- runkit_function_rename() - Change a function's name
- runkit_function_remove() - Remove a function definition
- runkit_method_redefine() - Dynamically changes the code of the given method