How to convert a string inside an array to array and combine both together?

Question

I have an array which look like this :

Result 1:

{
 "error_code": 0,
 "error_message": "",
 "return_data": {
    "items": [
        {
            "id": 462,
            "users": "1,36,38"
        },
        {
            "id": 462,
            "users": "1,4"
        },...... //same for 20 result
    ]
 }
}

I want the users to convert to an array,and separate by the comma,so the whole result will look like this :

The result I want:

{
    "error_code": 0,
    "error_message": "",
    "return_data": {
        "items": [
            {
                "id": 462,
                "users": [
                    {
                        "user_id": 1
                    },
                    {
                        "user_id": 36
                    },
                    {
                        "user_id": 38
                    }
                ],
            }.. //other result
        ]
    }
}

Here is what I try :

$res = "array the get the Result 1";
$items = //"I get the items array"

foreach ($items as $key => $item) {
    $usersArray = array(); //create a new Array

    //spilt the string to array separate with ","
    $usersIdArray = explode(',', $items['users']);

    //assign the "user_id" key to each value 
    foreach ($userIdArray as $key => $user) {

        $usersArray['user_id'] = $user;

    }
    //assign the result back to $res
    $res['return_data']['items']['users'] = $usersArray;
}

After I assign the array to $res with this line of code $res['return_data']['items']['users'] = $usersArray; ,my result become like below,I state the problem inside the code :

{
"error_code": 0,
"error_message": "",
"return_data": {
    "items": {
        "0":{ <-- // here suddenly appear a number for each result 
            "id": 462,
            "users": "1,36,38" //here nothing change (I want the array appear here)
        },
        "1":{
            "id": 462,
            "users": "1,36,38"
        },
        "2":{
            "id": 462,
            "users": "1,36,38"
        },
        "users": { //the array appear here but not the position I want..and it only appears 1 time.
            "user_id": "38"
        }

    }
  }
}

So my question is,how can I convert a String in an array to an array,assign value to the key,and make it inside the array?

Somebody please help..Thanks

How do you get that first array? If you create it on your own, might be better to adjust how it's created. — Qirel
– Qirel, Commented Jun 19, 2018 at 3:43
@Qirel I cant adjust how it created anymore..Cause it still have a lot of thing..For now I only can split the string to make it become the array.. — ken
– ken, Commented Jun 19, 2018 at 3:46

Kevin · Accepted Answer · 2018-06-19 04:01:49Z

1

Like the comments above, you could have done it the first time so you wouldn't need another structure conversion, but anyway, your code is already there a bit, its just you need to create another nesting since you want another level:

So you need another level here:

"users": [
    {
        "user_id": 1
    },
    {
        "user_id": 36
    },
    {
        "user_id": 38
    }
],

So in the code, just add []. This translates into:

foreach ($items as $key => $item) {
    $usersArray['id'] = $item['id'];
    $usersArray['users'] = array(); //create a new Array
    $usersIdArray = explode(',', $item['users']);
    foreach ($usersIdArray as $key => $user) {
        $usersArray['users'][] = array('user_id' => $user); // push each batch of key pair "user_id" key and value "each exploded id"
        // another level     ^
    }
    $res['return_data']['items'][] = $usersArray;
}

Here's the fiddle to check it out.

answered Jun 19, 2018 at 4:01

Kevin

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4 Comments

ken Over a year ago

bro by using your code,the users array appear the same level with items

Kevin Over a year ago

@ken check out this sample, pretty straight forward 3v4l.org/IiJDY

Kevin Over a year ago

@ken you can disregard it as it is not used

Kevin Over a year ago

@ken sure glad this helped

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