Adding empty json object in a pre-existing JSON Object and after a given json object index - Php

Question

so I have an Array of JSON Objects generated from mysql query.

JSON Object looks like:

[
  {"field1": "value1", "field2": "value2"},
  {"field1": "value3", "field2": "value4"},
  {"field1": "value5", "field2": "value6"},
  {"field1": "value7", "field2": "value8"}
]

now I want to add empty object like this: {} after 3rd JSON object in the array.

expected result:

[
  {"field1": "value1", "field2": "value2"},
  {"field1": "value3", "field2": "value4"},
  {"field1": "value5", "field2": "value6"},
  {},
  {"field1": "value7", "field2": "value8"}
]

I am able to loop through each json object and I am able to replace the current object's value but not sure how to add a whole new json empty object.

My code

for($j = 0; $j < $length; $j++) {

            if($j == 1 ){
                // HERE I dont want to replace Jth JSON Obj but add new empty Obj, something like $data.push('{}')
                $data[$j]['field1'] = '';
                $data[$j]['field2'] = '';
            }else{
                $data[$j]['question'] = $ques_arr[$j];
                $data[$j]['response'] = $allresponses[$j]['response'];
            }
        }

@Fei Can you show an example of what u mean by stdClass() ? — Murlidhar Fichadia
– Murlidhar Fichadia, Commented Jan 9, 2018 at 6:55
array_splice($data,$j,0,new stdClass()) this will insert an empty object at $j — Fei
– Fei, Commented Jan 9, 2018 at 7:04

sabeerzabi · Accepted Answer · 2018-01-09 07:14:52Z

3

    $json = '[
    {"field1": "value1", "field2": "value2"},
    {"field1": "value3", "field2": "value4"},
    {"field1": "value5", "field2": "value6"},
    {"field1": "value7", "field2": "value8"}
    ]';
    $temp = json_decode($json);
    $inserted = array( (object)[]);
    array_splice( $temp, 3, 0, $inserted );
    $result = json_encode($temp);
    var_dump($result);

answered Jan 9, 2018 at 7:14

sabeerzabi

4404 silver badges13 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Yuseferi · Accepted Answer · 2018-01-09 07:16:30Z

1

Try to add it via new \StdClass()OR [(object)[]] as example

$test = '[
{"field1": "value1", "field2": "value2"},
{"field1": "value3", "field2": "value4"},
{"field1": "value5", "field2": "value6"},
{"field1": "value7", "field2": "value8"}
]';
 $temp = json_decode($test);
 array_splice($temp, 3, 0, new \StdClass());
$result = json_encode($temp);
var_dump($result);

return [{"field1":"value1","field2":"value2"},{"field1":"value3","field2":"value4"},{},{"field1":"value7","field2":"value8"}]

update Use array_splice() and try :

    $test = '[
{"field1": "value1", "field2": "value2"},
{"field1": "value3", "field2": "value4"},
{"field1": "value5", "field2": "value6"},
{"field1": "value7", "field2": "value8"}
]';
    $temp = json_decode($test);
    $value = (new \StdClass());
    array_splice($temp, 3, 0, [(object)[]]);
    $result = json_encode($temp,true);
    var_dump($result);

as you wanted.

edited Jan 9, 2018 at 7:16

answered Jan 9, 2018 at 6:57

Yuseferi

8,83011 gold badges77 silver badges106 bronze badges

2 Comments

Murlidhar Fichadia Over a year ago

You have replaced the third Json Object to empty {}. I dont want to replace it but add a new object

Yuseferi Over a year ago

@MurlidharFichadia I resolved it, check my answer again plz.

Collectives™ on Stack Overflow

Adding empty json object in a pre-existing JSON Object and after a given json object index - Php

My code

2 Answers 2

Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

My code

2 Answers 2

Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related