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# runkit_function_redefine

(PECL)

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()

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