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 )

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

返回值

成功时返回 TRUE，或者在失败时返回 FALSE.

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

PHP手册 - N: Replace a function definition with a new implementation

用户评论:

lucato at gmail dot com (26-Dec-2011 12:10)

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.

corentin dot delorme at linagora dot com (05-Sep-2007 02:04)

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'); ?>