string_length_to_empty
String tests for empty must be done against '', not with strlen.
''
strlen
Risky when strlen is overridden, when called using a stringable object, also no longer triggers warning when called using non-string(able).
stringable
--- Original +++ New -<?php $a = 0 === strlen($b) || \STRLEN($c) < 1; +<?php $a = '' === $b || $c === '';
The rule is part of the following rule sets:
@PhpCsFixer:risky
@Symfony:risky