Removes final keyword from source code on-the-fly and allows mocking of final methods and classes

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v1.6.0 2023-11-19 22:19 UTC

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Last update: 2024-02-14 07:10:45 UTC


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Removes final and readonly keywords from source code on-the-fly and allows mocking of final methods and classes. It can be used together with any test tool such as PHPUnit, Mockery or Nette Tester.


The recommended way to install is through Composer:

composer require dg/bypass-finals --dev

It requires PHP version 7.1 and supports PHP up to 8.3.


Simply call this:


You need to enable it before the classes you want to remove the keywords from are loaded. So call it as soon as possible, preferably right after vendor/autoload.php is loaded.

Note that final internal PHP classes like Closure cannot be mocked.

The removal of readonly keywords can be disabled using the parameter:

DG\BypassFinals::enable(bypassReadOnly: false);

You can choose to only bypass keywords in specific files or directories:


This gives you finer control and can solve issues with certain frameworks and libraries.

You can try to increase performance by using the cache (the directory must exist):

DG\BypassFinals::setCacheDirectory(__DIR__ . '/cache');

To register BypassFinals in PHPUnit 10, simply add the extension to the PHPUnit XML configuration file:

	<bootstrap class="DG\BypassFinals\PHPUnitExtension"/>

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