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runkit7_function_redefine	runkit7_function_rename

runkit7 Functions	Last updated: Mon, 26 Oct 2026

runkit7_function_remove

(PECL runkit7 >= Unknown)

runkit7_function_remove — Remove a function definition

Description

function runkit7_function_remove(string $function_name): bool

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 php.ini.

Parameters

function_name: Name of the function to be deleted

Return Values

Returns true on success or false on failure.

See Also

runkit7_function_add() - Add a new function, similar to create_function
runkit7_function_copy() - Copy a function to a new function name
runkit7_function_redefine() - Replace a function definition with a new implementation
runkit7_function_rename() - Change a function's name

runkit7_function_redefine	runkit7_function_rename

runkit7 Functions	Last updated: Mon, 26 Oct 2026