PhpStorm 2019.3 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.

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

New in 2017.2

Last modified: 27 February 2020