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<spl_autoload_registerspl_classes>
^SPL FunctionsLast updated: Mon, 26 Oct 2026

spl_autoload_unregister

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

spl_autoload_unregister — Unregister given function as __autoload() implementation

Description

function spl_autoload_unregister(callable $callback): bool

Removes a function from the autoload queue. If the queue is activated and empty after removing the given function then it will be deactivated.

When this function results in the queue being deactivated, any __autoload function that previously existed will not be reactivated.

Parameters

callback

The autoload function being unregistered.

Return Values

Returns true on success or false on failure.

Changelog

Version Description
8.5.0 Passing the spl_autoload_call() function as a callback argument to unregister all autoloaders has been deprecated. Instead iterate over the return value of spl_autoload_functions() and call spl_autoload_unregister() on each value.

<spl_autoload_registerspl_classes>
^SPL FunctionsLast updated: Mon, 26 Oct 2026