.. _intllistformatter-object-is-already-constructed:

IntlListFormatter object is already constructed
-----------------------------------------------
 
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		IntlListFormatter object is already constructed: ``IntlListFormatter``, added in PHP 8.
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Description
___________
 
``IntlListFormatter``, added in PHP 8.5, wraps ICU's list formatter to render lists such as ``"a, b, and c"`` according to locale rules. Like other ``intl`` classes, its constructor guards against being run twice on the same object: the first successful call allocates the underlying ICU formatter, and a second call would leak that resource and leave the object in an inconsistent state.

Calling ``__construct()`` explicitly a second time -- directly, or indirectly through code that re-runs construction on an already built instance -- throws this error.

Example
_______

.. code-block:: php

   <?php
   
   $formatter = new IntlListFormatter('en_US');
   
   // Calling the constructor a second time on the same instance
   $formatter->__construct('fr_FR');
   
   ?>

Solutions
_________

+ Create a new ``IntlListFormatter`` instance instead of reusing and reconstructing the same object.
+ Never call ``__construct()`` manually after the object has already been created with ``new``.

Related Error Messages
______________________

+ :ref:`datetimezone-object-is-unconstructed`

See Also
________

+ `IntlListFormatter <https://www.php.net/manual/en/class.intllistformatter.php>`_

Changed Behavior
________________

This error may appear following an evolution in behavior, in previous versions. See ` <https://php-changed-behaviors.readthedocs.io/en/latest/behavior/.html>`_.