wp-includes/deprecated.php:1634Retrieve the ID of the author of the current post.
string|intfunction get_the_author_ID() { _deprecated_function( __FUNCTION__, '2.8.0', 'get_the_author_meta(\'ID\')' ); return get_the_author_meta('ID');}Introduced in 1.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/deprecated.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.