add_action( 'wp_enqueue_scripts', function() {
wp_enqueue_style(
'highlightjs',
'//cdnjs.cloudflare.com/ajax/libs/highlight.js/11.8.0/styles/a11y-dark.min.css'
);
wp_enqueue_script(
'highlightjs',
'//cdnjs.cloudflare.com/ajax/libs/highlight.js/11.8.0/highlight.min.js',
);
wp_enqueue_script(
'highlightjs-php',
'//cdnjs.cloudflare.com/ajax/libs/highlight.js/11.8.0/languages/php.min.js',
);
add_action( 'wp_print_footer_scripts', function() {
?>
<script type="text/javascript">hljs.highlightAll();</script>
<?php
} );
} );This example includes PHP syntax highlighting. Set your Code block class (under Advanced) to language-php
