PhpStorm 2020.1 Help

Code Inspection: Empty branch in alternation

Reports empty branches in a RegExp alternation. For example:
a || b

An empty branch will only match the empty string, and in most cases that is not what is desired. This inspection will not report a single empty branch at the start or the end of an alternation.

New in 2017.2

Last modified: 5 June 2020