‘%s’ is an invalid class name

Description

This error is emitted when a fully qualified name is used as a type (property, constant, parameter, returntype), and that cannot be a valid name. For example, this applies to \self, \static, \parent. Other keywords, such as true, null get a different error message.

Note also that all keywords are not covered with this error message, and some have slipped through the checks: for example, \interface, \class, \enum, \resource… are all valid code. In fact, PHP won’t create objects of such types, so this makes such type unusable.

Example

<?php

class x {
     function foo(\self $s) {}
}

?>

Solutions

• Do not use PHP keywords as fully qualified name with a type.