.. _php-arraykeyexistswithobjects:

.. _array\_key\_exists()-works-on-arrays:

array_key_exists() Works On Arrays
++++++++++++++++++++++++++++++++++

  `array_key_exists() <https://www.php.net/array_key_exists>`_ requires arrays as second argument. Until PHP 7.4, objects were also allowed, yet it is now deprecated.

.. code-block:: php
   
   <?php
   
   // Valid way to check for key
   $array = ['a' => 1];
   var_dump(array_key_exists('a', $array))
   
   
   // Deprecated since PHP 7.4
   $object = new Stdclass();
   $object->a = 1;
   var_dump(array_key_exists('a', $object))
   
   ?>

See also `array_key_exists() with objects <https://wiki.php.net/rfc/deprecations_php_7_4#array_key_exists_with_objects>`_ and `array_key_exists <https://php.net/array-key-exists>`_.

Related PHP errors 
-------------------

  + `0 <https://php-errors.readthedocs.io/en/latest/messages/Using+array_key_exists%28%29+on+objects+is+deprecated.+Use+isset%28%29+or+property_exists%28%29+instead.html>`_



Connex PHP features
-------------------

  + `index <https://php-dictionary.readthedocs.io/en/latest/dictionary/index.ini.html>`_
  + `array <https://php-dictionary.readthedocs.io/en/latest/dictionary/array.ini.html>`_


Suggestions
___________

* Use the (array) cast to turn the object into an array
* Use the native PHP function proprety_exists() or isset() on the property to check them.




Specs
_____

+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Short name   | Php/ArrayKeyExistsWithObjects                                                                                                                                                                  |
+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Rulesets     | :ref:`All <ruleset-All>`, :ref:`Analyze <ruleset-Analyze>`, :ref:`CE <ruleset-CE>`, :ref:`Changed Behavior <ruleset-Changed-Behavior>`, :ref:`CompatibilityPHP74 <ruleset-CompatibilityPHP74>` |
+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Exakat since | 1.9.0                                                                                                                                                                                          |
+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| PHP Version  | With PHP 7.4 and older                                                                                                                                                                         |
+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Severity     | Minor                                                                                                                                                                                          |
+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Time To Fix  | Quick (30 mins)                                                                                                                                                                                |
+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Precision    | High                                                                                                                                                                                           |
+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Available in | `Entreprise Edition <https://www.exakat.io/entreprise-edition>`_, `Community Edition <https://www.exakat.io/community-edition>`_, `Exakat Cloud <https://www.exakat.io/exakat-cloud/>`_        |
+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+