PHP 8 not compatible

  • After upgrading to PHP 8.0 the site does not work -shows a white page- and causes this error:

    Got error 'PHP message: PHP Fatal error: Uncaught Error: Undefined constant "HEADER" in [...]/wp-content/themes/sparkling/inc/custom-header.php:56

    Downgrading to PHP 7.4, site works again.

    As far as I understand the code at wp-content/themes/sparkling/inc/custom-header.php, this must be chenged:

    		@$a = HEADER; // @codingStandardsIgnoreLine
		@$b = TEXTCOLOR; // @codingStandardsIgnoreLine

    to:

    		@$a = 'HEADER'; // @codingStandardsIgnoreLine
		@$b = 'TEXTCOLOR'; // @codingStandardsIgnoreLine

    Change must be applied to parent theme, not child theme.

    With this changes, site works in PHP 8.

    Regards.

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