PHP Conference Nagoya 2025

spl_autoload_unregister

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

spl_autoload_unregisterUnregister given function as __autoload() implementation

Description

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.

add a note

User Contributed Notes 2 notes

up
14
edgarortegaramirez at example dot com
11 years ago
$functions = spl_autoload_functions();
foreach($functions as $function) {
spl_autoload_unregister($function);
}

A nice way to unregister all functions.
up
2
Julien B.
15 years ago
Restore the binding to __autoload after using a spl_autoload_register() call

<?php
spl_autoload_register
(array('Doctrine', 'autoload'));

// some process

spl_autoload_unregister(array('Doctrine', 'autoload'));

// but now the old __autoload is not triggered anymore
// you need to use :
spl_autoload_register('__autoload');

// but this will throw a LogicExeption if the __autoload
// function is not defined yet, so use:
function autoload__ ( $className ) {
if (
function_exists('__autoload'))
__autoload($className);
}

spl_autoload_register('autoload__');

?>

So you can define your old __autoload in another file for example

May helps some folks in this catch 22
To Top