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- ================
- Rule ``is_null``
- ================
- Replaces ``is_null($var)`` expression with ``null === $var``.
- .. warning:: Using this rule is risky.
- Risky when the function ``is_null`` is overridden.
- Configuration
- -------------
- ``use_yoda_style``
- ~~~~~~~~~~~~~~~~~~
- .. warning:: This option is deprecated and will be removed on next major version. Use ``yoda_style`` fixer instead.
- Whether Yoda style conditions should be used.
- Allowed types: ``bool``
- Default value: ``true``
- Examples
- --------
- Example #1
- ~~~~~~~~~~
- *Default* configuration.
- .. code-block:: diff
- --- Original
- +++ New
- @@ -1,2 +1,2 @@
- <?php
- -$a = is_null($b);
- +$a = null === $b;
- Rule sets
- ---------
- The rule is part of the following rule sets:
- @Symfony:risky
- Using the ``@Symfony:risky`` rule set will enable the ``is_null`` rule with the default config.
- @PhpCsFixer:risky
- Using the ``@PhpCsFixer:risky`` rule set will enable the ``is_null`` rule with the default config.
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