.. _invalid-indentation---tabs-and-spaces-cannot-be-mixed:

Invalid indentation - tabs and spaces cannot be mixed
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		Invalid indentation - tabs and spaces cannot be mixed: Since PHP 7.
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Description
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Since PHP 7.3, HEREDOCS and NOWDOCS syntax allows the text to be indented by the same amount than the closing tag (here ``X``). The indentation must be built with only spaces or only tabulations, and cannot be a mix of both.

Example
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.. code-block:: php

   <?php
   
   $x = <<<X
          classic text
   	 X // one tabulation + one space
   
   ?>

Solutions
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+ Make the indentation spaces only.
+ Make the indentation tabulations only.