Adding to JSON with PHP

Question

I have tried everything and it is probably very simple to solve. I want to add to a JSON object. I have searched and found examples but it does not yield the results I want. I have a JSON object that looks like this

{"d86":"2020-03-04","d76":"2020-03-05"}

Now I want to append to this so it looks like this

{"d86":"2020-03-04","d76":"2020-03-05","d97":"2020-05-08"}

The examples of how to do this give me this result

{"d86":"2020-03-04","d76":"2020-03-05","0":{"d97":"2020-03-08"}}

This is my code:

$j = array('d86'=>'2020-03-04','d76'=>'2020-03-05');

$j = json_encode($j);

$j = json_decode($j, true);

$new_date = array('d97'=>'2020-03-08');

$j[] = $new_date;

$j = json_encode($j);

print_r($j);

Nick · Accepted Answer · 2020-03-06 01:12:48Z

1

You can just "add" the $new_date to the existing array:

$j += $new_date;

Output:

{
    "d86": "2020-03-04",
    "d76": "2020-03-05",
    "d97": "2020-03-08"
}

Demo on 3v4l.org

answered Mar 6, 2020 at 1:12

Nick

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3 Comments

Joseph Over a year ago

brilliant, how i missed this one :)

MSC Over a year ago

Nice. I did not think you can treat an array like a string.

Nick Over a year ago

@MSC you're not really treating it as a string, + is a defined operator for arrays: php.net/manual/en/language.operators.array.php

Joseph · Accepted Answer · 2020-03-06 01:17:36Z

0

In case you have multiple rows to add

you could use foreach to be like this

foreach($new_date as $key => $value){
    $j[$key] = $value;
}

so it will be like this one

$j = array('d86'=>'2020-03-04','d76'=>'2020-03-05');

$j = json_encode($j);

$j = json_decode($j, true);

$new_date = ['d97'=>'2020-03-08'];

foreach($new_date as $key => $value){
    $j[$key] = $value;
}

$j = json_encode($j);

print_r($j);

answered Mar 6, 2020 at 1:17

Joseph

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