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Rule ``no_unset_cast``

doc/rules/cast_notation/no_unset_cast.rst

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Original Source

====================== Rule no_unset_cast

Variables must be set null instead of using (unset) casting.

Examples

Example #1


.. code-block:: diff

   --- Original
   +++ New
    <?php
   -$a = (unset) $b;
   +$a =  null;

Rule sets
---------

The rule is part of the following rule sets:

- `@PHP8x0Migration <./../../ruleSets/PHP8x0Migration.rst>`_
- `@PHP8x1Migration <./../../ruleSets/PHP8x1Migration.rst>`_
- `@PHP8x2Migration <./../../ruleSets/PHP8x2Migration.rst>`_
- `@PHP8x3Migration <./../../ruleSets/PHP8x3Migration.rst>`_
- `@PHP8x4Migration <./../../ruleSets/PHP8x4Migration.rst>`_
- `@PHP8x5Migration <./../../ruleSets/PHP8x5Migration.rst>`_
- `@PHP80Migration <./../../ruleSets/PHP80Migration.rst>`_ *(deprecated)*
- `@PHP81Migration <./../../ruleSets/PHP81Migration.rst>`_ *(deprecated)*
- `@PHP82Migration <./../../ruleSets/PHP82Migration.rst>`_ *(deprecated)*
- `@PHP83Migration <./../../ruleSets/PHP83Migration.rst>`_ *(deprecated)*
- `@PHP84Migration <./../../ruleSets/PHP84Migration.rst>`_ *(deprecated)*
- `@PHP85Migration <./../../ruleSets/PHP85Migration.rst>`_ *(deprecated)*
- `@PhpCsFixer <./../../ruleSets/PhpCsFixer.rst>`_
- `@Symfony <./../../ruleSets/Symfony.rst>`_

References
----------

- Fixer class: `PhpCsFixer\\Fixer\\CastNotation\\NoUnsetCastFixer <./../../../src/Fixer/CastNotation/NoUnsetCastFixer.php>`_
- Test class: `PhpCsFixer\\Tests\\Fixer\\CastNotation\\NoUnsetCastFixerTest <./../../../tests/Fixer/CastNotation/NoUnsetCastFixerTest.php>`_

The test class defines officially supported behaviour. Each test case is a part of our backward compatibility promise.