.. _must-be-a-valid-charset:

must be a valid charset
-----------------------
 
.. meta::
	:description:
		must be a valid charset: This is a Windows only error.
	:og:image: https://php-errors.readthedocs.io/en/latest/_static/logo.png
	:og:type: article
	:og:title: must be a valid charset
	:og:description: This is a Windows only error
	:og:url: https://php-errors.readthedocs.io/en/latest/messages/must-be-a-valid-charset.html
	:og:locale: en
	:twitter:card: summary_large_image
	:twitter:site: @exakat
	:twitter:title: must be a valid charset
	:twitter:description: must be a valid charset: This is a Windows only error
	:twitter:creator: @exakat
	:twitter:image:src: https://php-errors.readthedocs.io/en/latest/_static/logo.png

.. raw:: html

	<script type="application/ld+json">{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/php-errors.readthedocs.io\/en\/latest\/tips\/must-be-a-valid-charset.html","url":"https:\/\/php-errors.readthedocs.io\/en\/latest\/tips\/must-be-a-valid-charset.html","name":"must be a valid charset","isPartOf":{"@id":"https:\/\/www.exakat.io\/"},"datePublished":"Tue, 31 Mar 2026 09:10:46 +0000","dateModified":"Tue, 31 Mar 2026 09:10:46 +0000","description":"This is a Windows only error","inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/php-tips.readthedocs.io\/en\/latest\/tips\/must-be-a-valid-charset.html"]}]},{"@type":"WebSite","@id":"https:\/\/www.exakat.io\/","url":"https:\/\/www.exakat.io\/","name":"Exakat","description":"Smart PHP static analysis","inLanguage":"en-US"}]}</script>

Description
___________
 
This is a Windows only error. It is related to converting a string to another encoding, and failing. No information is available about it.

Example
_______

.. code-block:: php

   

Solutions
_________

+ 

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>`_.