wp-admin/includes/upgrade.php:2082Executes changes made in WordPress 4.4.0.
function upgrade_440() { global $wp_current_db_version, $wpdb; if ( $wp_current_db_version < 34030 ) { $wpdb->query( "ALTER TABLE {$wpdb->options} MODIFY option_name VARCHAR(191)" ); } // Remove the unused 'add_users' role. $roles = wp_roles(); foreach ( $roles->role_objects as $role ) { if ( $role->has_cap( 'add_users' ) ) { $role->remove_cap( 'add_users' ); } }}Introduced in 4.4.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/upgrade.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.