Remove index based json object name in php [duplicate] - php

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PHP Array to JSON Array using json_encode(); [duplicate]
(4 answers)
Closed 5 years ago.
I tried real hard for my title to make sense haha. I have this JSON:
[{
"0": {
"id": 130427,
"created_at": 1512521776301,
"updated_at": 1512549188911,
"category": 0,
"platform": 6,
"date": 1513987200000,
"region": 8,
"y": 2017,
"m": 12,
"human": "2017-Dec-23",
"game": 76663
},
"2": {
"id": 131795,
"created_at": 1514172411633,
"updated_at": 1514190849639,
"category": 0,
"platform": 39,
"date": 1513987200000,
"region": 8,
"y": 2017,
"m": 12,
"human": "2017-Dec-23",
"game": 78658
}
}]
As you can see the position of the JSON object in the global json serves as the name of the object and I don't want this. This is what I want:
[{
"id": 130427,
"created_at": 1512521776301,
"updated_at": 1512549188911,
"category": 0,
"platform": 6,
"date": 1513987200000,
"region": 8,
"y": 2017,
"m": 12,
"human": "2017-Dec-23",
"game": 76663
},
{
"id": 131795,
"created_at": 1514172411633,
"updated_at": 1514190849639,
"category": 0,
"platform": 39,
"date": 1513987200000,
"region": 8,
"y": 2017,
"m": 12,
"human": "2017-Dec-23",
"game": 78658
}
]
I want the objects without a name. This is the code I'm using:
$json = file_get_contents('./releases.json');
$data = json_decode($json, TRUE);
$region = isset($_GET['region']) ? $_GET['region'] : null;
# if region is not null: ?region=8
if ($region) {
$region_filter = function($v) use ($region) {
// 8 == Worldwide
if ($v['region'] == $region || $v['region'] == 8) {
return true;
} else {
return false;
}
};
$data = array_filter($data['data'], $region_filter);
}
header('Content-Type: application/json');
echo json_encode(array($data)); // good
Thank you

Answer 1

You need to use array_values() to reindex the array.
PHP's json_encode() function will only produce an array if all array keys are numeric and don't have any gaps, e.g. 0, 1, 2, 3 etc. The problem is that array_filter() can remove certain keys and leave gaps, which causes json_encode() to include the keys as you show in your example. You can fix this by using array_values() to re-index the array before calling json_encode().
Here is an example:
<?php
// numeric array keys with no gaps
$a = ['a', 'b', 'c'];
echo json_encode($a);
// ["a","b","c"]
// filter out the 'b' element to introduce a gap in the keys
$a = array_filter($a, function ($v) {
return $v !== 'b';
});
echo json_encode($a);
// {"0":"a","2":"c"}
// re-index the array to remove gaps
$a = array_values($a);
echo json_encode($a);
// ["a","c"]