Online PHP editor | refs for RQ42S

<?php $menu = array( array('id' => '1', 'catagory' => 'newbooks','title' => 'Alex','price' => 4.95, 'desc' => 'bbbb'), array('id' => '2','catagory' => 'newbooks','title' => 'David ','price' => 5.95, 'desc' => 'sss'), array('id' => '2','catagory' => 'newbooks','title' => 'David ','price' => 5.95, 'desc' => 'sss') ); array_walk($menu, function(&$key, $val){ $key = $val['id']; });