# runkit_function_redefine

(PECL runkit:0.7-0.9)

runkit_function_redefine — Replace a function definition with a new implementation

### Description

bool runkit_function_redefine ( string `$funcname` , string `$arglist` , string `$code` )

> Note: By default, only userspace functions may be removed, renamed, or modified. In order to override internal functions, you must enable the runkit.internal_override setting in the system-wide php.ini file.

### Parameters

`funcname`

  Name of function to redefine

`arglist`

  New list of arguments to be accepted by function

`code`

  New code implementation

### Return Values

Returns `TRUE` on success or `FALSE` on failure.

### Examples

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();
?>`

The above example will output:

    Original Testme Implementation
    New Testme Implementation

### See Also

- runkit_function_add()
- runkit_function_copy()
- runkit_function_rename()
- runkit_function_remove()