array_filter adds additional index in my array, how to get rid of it?

Question

I have a array created from json

$fullResult = json_decode('[{"qid":"1", "result":"helo"}, {"qid":"2", "result":"ad"}, {"qid":"3", "result":"testing"}, {"qid":"4", "result":"dd"}]');

function filterArray($value){
    global $id;
    return ($value->qid > $id);
}

$filteredResult = array_filter($fullResult, 'filterArray');

The $id is 2

When I echo json_encode($fullResult); The result is

[   {"qid": "1", "result": "helo"},
    {"qid": "2", "result": "ad"},
    {"qid": "3", "result": "testing"},
    {"qid": "4", "result": "dd"}    ]

However, when I echo json_encode($filteredResult); the result as below (e.g. having the additional index.

{  "2":{"qid":"3","result":"testing"},
   "3":{"qid":"4","result":"dd"}   }

I want it to be as below instead

[  {"qid":"3","result":"testing"},
   {"qid":"4","result":"dd"}   ]

How could I achieve that?

score 1 · Answer 1 · answered Apr 03 '18 at 09:31

1

array_filter will retain the key. If you want to make it a simple array, you can use array_values

$filteredResult = array_values(array_filter($fullResult, 'filterArray'));

echo json_encode($filteredResult);

This will result to:

[{"qid":"3","result":"testing"},{"qid":"4","result":"dd"}]

Doc: array_values

answered Apr 03 '18 at 09:31

Eddie

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Thanks!. Two also correct value, I upvote both, not sure who to tick yet. – Elye Apr 03 '18 at 09:36

score 1 · Accepted Answer · answered Apr 03 '18 at 09:32

1

Instead of

echo json_encode($filteredResult);

try something along the lines of,

echo json_encode(array_values($filteredResult));

array_values would eliminate the unwanted indexes.

answered Apr 03 '18 at 09:32

Manav

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Thanks!. Two also correct value, I upvote both, not sure who to tick yet. – Elye Apr 03 '18 at 09:36
I uptick this one as answer, as you answered first. Thanks!! – Elye Apr 03 '18 at 09:39

score 0 · Answer 3 · answered Apr 03 '18 at 09:47

0

You can set it by loop also.

$singleArray = array();

foreach ($filteredResult as $key => $value){
        $singleArray[] = $value;
}
echo json_encode($singleArray);exit;

answered Apr 03 '18 at 09:47

Virb

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array_filter adds additional index in my array, how to get rid of it?

3 Answers3