Online PHP editor | refs for DU73Y

<?php $arr = array(); $arr['01'] = 'sdf'; $arr['09'] = 'sdf2'; $arr['10'] = 'sdf3'; $arr['11'] = 'sdf3'; $arr['jj'] = 'sdf3'; $arr2[1] = 'sdf'; $arr2[9] = 'sdf2'; $arr2[10] = 'sdf3'; $arr2[11] = 'sdf3'; $newArray = array_merge(array(""=>""), $arr2); $good_array = array(""=>"") + $arr2; print_r($newArray); print_r($good_array);