wp-includes/pluggable-deprecated.php:66Retrieve user info by login name.
$user_loginstringbool|objectfunction get_userdatabylogin($user_login) { _deprecated_function( __FUNCTION__, '3.3.0', "get_user_by('login')" ); return get_user_by('login', $user_login);}Introduced in 0.71. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/pluggable-deprecated.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.