runkit_function_redefine

(PECL runkit >= 0.7.0)

runkit_function_redefine Replace a function definition with a new implementation

说明

bool 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 ] )

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

add a note add a note

User Contributed Notes 2 notes

up
11
lucato at gmail dot com
5 years ago
Note to users: language constructs (eval, die, exit, isset, unset, echo etc.) which might be confused with functions, cannot be renamed or redefined even with runkit.internal_override.
up
5
corentin dot delorme at linagora dot com
10 years ago
Here is another example with a parameter:

<?php

function hello_world($word) {
  echo
"Original Hello World: $word\n</br>";
}

$helloWorld = 'echo "Redefined Hello World: $word\n</br>";';

hello_world('test1');

runkit_function_redefine('hello_world', '$word', $helloWorld);

hello_world('test2');

?>
To Top