Type %s contains both object and a class type

Description

The object type already matches an instance of any class. Adding a specific class name next to it in a union type, such as object|Test, does not widen what is accepted: every value that matches Test already matches object. PHP detects this redundancy purely from the type names, without needing Test to be defined or loaded.

The full message reads: Type %s contains both object and a class type, which is redundant.

Example

<?php

function test(): object|Test {
}

?>

Literal Examples

• Type Test|object contains both object and a class type, which is redundant

Solutions

• Remove the specific class name, and keep only object.

• Remove object, and keep only the specific class name, if that narrower type is what is actually intended.

Related Error Messages

• Type %s contains both iterable and array, which is redundant

• Type contains both true and false, bool must be used instead

• Duplicate type %s is redundant

Changed Behavior

This error may appear following an evolution in behavior, in previous versions. See ` <https://php-changed-behaviors.readthedocs.io/en/latest/behavior/.html>`_.