Cannot use ‘mixed’ as class name as it is reserved

Description

mixed is a PHP reserved keyword, since PHP 8.0. Until then, it was possible to use it anywhere as names, but since PHP 8.0, it is forbidden with class names, interfaces, enumerations and traits.

The same error is used for all CITE structures : class, interfaces, traits and enumerations.

Namespaces do not solve this issue.

mixed as a function, method, property, global or class constants is legit.

Example

<?php

class Mixed {}
interface Mixed {}
trait Mixed {}
enum Mixed {}

?>

Solutions

• Use another name for that class.