wp-includes/formatting.php:5200Callback function used by preg_replace.
$matchesstring[]stringfunction wp_pre_kses_less_than_callback( $matches ) { if ( ! str_contains( $matches[0], '>' ) ) { return esc_html( $matches[0] ); } return $matches[0];}Introduced in 2.3.0. 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.