no_unset_cast
Variables must be set null instead of using (unset) casting.
null
(unset)
--- Original +++ New <?php -$a = (unset) $b; +$a = null;
The rule is part of the following rule sets:
@PHP80Migration
@PHP81Migration
@PHP82Migration
@PHP83Migration
@PhpCsFixer
@Symfony
PhpCsFixer\Fixer\CastNotation\NoUnsetCastFixer