- var_dump: documentation ( source)
- json_decode: documentation ( source)
- implode: documentation ( source)
<?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($cat_limit);
unset($arr[5]);
var_dump($arr);