.. _type-hexadecimalstring:

.. _hexadecimal-in-string:

Hexadecimal In String
+++++++++++++++++++++

  Mark strings that may be confused with hexadecimal. 

Until PHP 7.0, PHP recognizes hexadecimal numbers inside strings, and converts them accordingly. 

PHP 7.0 and until 7.1, converts the string to 0, silently. 

PHP 7.1 and later, emits a 'A non-numeric value encountered' warning, and convert the string to 0.

.. code-block:: php
   
   <?php
       $a = '0x0030';
       print $a + 1;
       // Print 49
   
       $c = '0x0030zyc';
       print $c + 1;
       // Print 49
   
       $b = 'b0x0030';
       print $b + 1;
       // Print 0
   ?>

See also `Integer Syntax <https://www.php.net/manual/en/language.types.integer.php#language.types.integer.syntax>`_.

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

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


Specs
_____

+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Short name   | Type/HexadecimalString                                                                                                                                                                                                             |
+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Rulesets     | :ref:`All <ruleset-All>`, :ref:`Changed Behavior <ruleset-Changed-Behavior>`, :ref:`CompatibilityPHP70 <ruleset-CompatibilityPHP70>`, :ref:`CompatibilityPHP71 <ruleset-CompatibilityPHP71>`, :ref:`Inventory <ruleset-Inventory>` |
+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Exakat since | 0.8.4                                                                                                                                                                                                                              |
+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| PHP Version  | All                                                                                                                                                                                                                                |
+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Severity     | Major                                                                                                                                                                                                                              |
+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Time To Fix  | Slow (1 hour)                                                                                                                                                                                                                      |
+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Precision    | Very high                                                                                                                                                                                                                          |
+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Available in | `Entreprise Edition <https://www.exakat.io/entreprise-edition>`_, `Exakat Cloud <https://www.exakat.io/exakat-cloud/>`_                                                                                                            |
+--------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+