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ReflectionFunctionAbstract	Last updated: Mon, 26 Oct 2026

ReflectionFunctionAbstract::isDeprecated

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

ReflectionFunctionAbstract::isDeprecated — Checks if deprecated

public function ReflectionFunctionAbstract::isDeprecated(): bool

Checks whether the function is deprecated.

This function has no parameters.

true if it's deprecated, otherwise false

Example #1 ReflectionFunctionAbstract::isDeprecated() example

<?php
$rf = new ReflectionFunction('ereg');
var_dump($rf->isDeprecated());
?>

The above example will output:

bool(true)