wp-includes/deprecated.php:3299Check that the user login name and password is correct.
$user_loginstring$user_passstringboolfunction user_pass_ok($user_login, $user_pass) { _deprecated_function( __FUNCTION__, '3.5.0', 'wp_authenticate()' ); $user = wp_authenticate( $user_login, $user_pass ); if ( is_wp_error( $user ) ) return false; return true;}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/deprecated.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.