wp-admin/includes/class-pclzip.php:1069$p_index function deleteByIndex($p_index) { $p_list = $this->delete(PCLZIP_OPT_BY_INDEX, $p_index); // ----- Return return $p_list; }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/class-pclzip.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.