使用PHP将组数据库数据编码为JSON

Question

Is there anyway to format JSON encoded data that is fetched from mysql Database , with an index ?

Example :

The current JSON i have in text :

[{"category_id":"1","category_name":"Luarb1"},{"category_id":"2","category_name":"Luarb2"}]

How i want it to be formatted :

{"1":[{"category_id":"1","category_name":"Luarb1"}], "2":[{"category_id":"2","category_name":"Luarb2"}]}

Answer 1

<?php

// init variables
$arr = '[{"category_id":"1","category_name":"Luarb1"},{"category_id":"2","category_name":"Luarb2"}]';
$new = [];

// decode JSON array
$decoded = json_decode($arr);

// create the new array to be encoded
$i = 1;
foreach ($decoded as $cur) {
    $new[$i++] = [$cur];
}

// encode the new array
$encoded = json_encode($new);

// test if everything worked
var_dump($encoded);

// tests.php:15:string '{"1":[{"category_id":"1","category_name":"Luarb1"}],"2":[{"category_id":"2","category_name":"Luarb2"}]}' (length=103)

Here is how I solved your problem, I didn't succeed in starting the array key at 0 but you wanted to be at 1 I think).

If you want the index from the database entry, you may need to improve your SELECT SQL query and retrieve id, then parse it in JSON and so on...