===============================
Rule ``combine_nested_dirname``
===============================

Replace multiple nested calls of ``dirname`` by only one call with second
``$level`` parameter. Requires PHP >= 7.0.

.. warning:: Using this rule is risky.

   Risky when the function ``dirname`` is overridden.

Examples
--------

Example #1
~~~~~~~~~~

.. code-block:: diff

   --- Original
   +++ New
   @@ -1,2 +1,2 @@
    <?php
   -dirname(dirname(dirname($path)));
   +dirname($path, 3);

Rule sets
---------

The rule is part of the following rule sets:

@PHP70Migration:risky
  Using the ``@PHP70Migration:risky`` rule set will enable the ``combine_nested_dirname`` rule.

@PHP71Migration:risky
  Using the ``@PHP71Migration:risky`` rule set will enable the ``combine_nested_dirname`` rule.

@PHP80Migration:risky
  Using the ``@PHP80Migration:risky`` rule set will enable the ``combine_nested_dirname`` rule.