wp-includes/formatting.php:615Separates HTML elements and comments from the text.
$inputstringstring[]function wp_html_split( $input ) { return preg_split( get_html_split_regex(), $input, -1, PREG_SPLIT_DELIM_CAPTURE );}Introduced in 4.2.4. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/formatting.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.