ReflectionFunctionAbstract::isStatic	ReflectionFunctionAbstract::isVariadic

ReflectionFunctionAbstract	Last updated: Mon, 26 Oct 2026

ReflectionFunctionAbstract::isUserDefined

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

ReflectionFunctionAbstract::isUserDefined — Checks if user defined

public function ReflectionFunctionAbstract::isUserDefined(): bool

Checks whether the function is user-defined, as opposed to internal.

This function has no parameters.

true if it's user-defined, otherwise false;