Online PHP editor | refs for Ogn5G

<?php $arr = array( 'operator_id_1' => 'operator_bp_id_100', 'operator_id_2' => 'operator_bp_id_200', 'operator_id_3' => 'operator_bp_id_300', 'operator_id_4' => 'operator_bp_id_400' ); $keys = array_keys($arr); if (($key = array_search("operator_id_2", $keys) - 1) < 0) { $key = count($keys) - 1; } print $keys[$key];