namespace namespace

<?php

namespace namespace {}

?>

The only forbidden name for a namespace is namespace. Not only is it confusing, but also, that keyword is used later for prefixing names. The correct names follow the usual PHP regex, with a leading letter or underscore, followed by a list of alpha-numeric characters; unicode beyond 255 are also used.

See Also

• namespace namespace [Try me]

PHP Features

• namespace
• eponymous
• reserved-name

Last updated: 11 October 2026