themes

Custom page template from plugin does not work with pre-installed themes in WordPress 6.6.1

Newer themes including Twenty Twenty Four use block themes/Full Site Editing. This means all the templates are created with HTML and theme.json, not using PHP templates at all anymore. You can read up on bloc themes, and see ways to create a “hybrid theme” which uses both PHP and HTML, here – https://fullsiteediting.com/courses/full-site-editing-for-theme-developers/

what use have double styles in index.html?

The <!– wp: tags are how the WordPress editor internal api control what has been generated on the page and it contains the data that is generated or controlled by the settings panel of the editor. In general, those settings are directly converted to some html / style that you see on the page but … Read more

Upgraded php & wordpress but theme broke

<?php the_post_thumbnail(thumbnail); ?> should be <?php the_post_thumbnail( “thumbnail” ); ?>. thumbnail is not a defined constant, and the updated version of PHP is no longer converting undefined constants into strings for you. It appears that PHP changed the “undefined constants” message from a notice to a fatal error sometime around version 8.

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