wp-content/themes/twentytwentyone/inc/template-functions.php:48Adds custom class to the array of posts classes.
$classesarrayarrayfunction twenty_twenty_one_post_classes( $classes ) { $classes[] = 'entry'; return $classes;}Introduced in Twenty Twenty-One 1.0. One change between 6.7.7 and 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
array to string[].verified against sourcesrc/wp-content/themes/twentytwentyone/inc/template-functions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.