Online PHP editor | refs for jrYpP

<?php $arr='[2,5,"test"]'; $cat_limit = json_decode($arr, true);var_dump($cat_limit); echo implode($cat_limit, ','); $arr2='{"luo":{"item_id": 21,"title": "可口可乐600ml"},"tt":{"item_id": 22,"title": "可口可乐600ml"}}'; $cat_limit = json_decode($arr2, true);var_dump($cat_limit); $arr=[1,2,66,88]; $aitem_ids = explode(',', $arr); $aitem_ids = array_flip(array_flip($aitem_ids)); echo implode($aitem_ids, ','); unset($arr[5]); var_dump($arr);