How to remove array of object in PHP - php

Question

<?php
$test = '{
"100": {
"name": "Sports",
"contentID": "100"
},
"200": {
"name": "Village",
"contentID": "200"
}
}';
$idWiseData = json_decode($test,true);
$test2 = '[
{
"contentID": "100",
"contentStatus": "active"
},
{
"contentID": "200",
"contentStatus": "active"
},
{
"contentID": "300",
"contentStatus": "active"
}
]';
$allTopics = json_decode($test2,true);
foreach ($allTopics as $key => &$topic) {
$contentInfo = [
'contentStatus' => $topic['contentStatus']
];
$topic['contentName'] = isset($idWiseData[$topic['contentID']]['name']) ? $idWiseData[$topic['contentID']]['name'] : null;
}
echo "<pre>";
print_r($allTopics);
?>
Above code is working fine, i am not getting my expected output. actually $allTopics having 3 objects (contentID 100 & 200 & 300).$idWiseData having object (contentID 100 & 200).
I want to take name value from $idWiseData and replace to $allTopics based on contentID.
contentID 300 don't have name so should not come this object.
Expected out put
Array
(
[0] => Array
(
[contentID] => 100
[contentStatus] => active
[contentName] => Sports
)
[1] => Array
(
[contentID] => 200
[contentStatus] => active
[contentName] => Village
)
)
I am getting output
Array
(
[0] => Array
(
[contentID] => 100
[contentStatus] => active
[contentName] => Sports
)
[1] => Array
(
[contentID] => 200
[contentStatus] => active
[contentName] => Village
)
[2] => Array
(
[contentID] => 300
[contentStatus] => active
[contentName] =>
)
)
Kindly anyone update my code please.

Answer 1

As far as I understand you, you need to unset() the index within the array if contentName is null. This can be achieved by using unset()
foreach ($allTopics as $key => &$topic) {
// your code here ....
if (is_null($topic['contentName'])) {
unset(allTopics[$key]);
}
}

Answer 2

You can remove a record from the array by using array_slice. But I would recommend you to change your code and have a 3rd array which must be your result, so then you don't need to change any of your source data.

Answer 3

You're not deleting the index from the array just setting contentName to null. Use unset to delete the index from the array.
Try this one:
<?php
$test = '{
"100": {
"name": "Sports",
"contentID": "100"
},
"200": {
"name": "Village",
"contentID": "200"
}
}';
$idWiseData = json_decode($test,true);
$test2 = '[
{
"contentID": "100",
"contentStatus": "active"
},
{
"contentID": "200",
"contentStatus": "active"
},
{
"contentID": "300",
"contentStatus": "active"
}
]';
$allTopics = json_decode($test2,true);
foreach ($allTopics as $key => &$topic) {
$contentInfo = [
'contentStatus' => $topic['contentStatus']
];
if(isset($idWiseData[$topic['contentID']]['name'])){
$topic['contentName'] = $idWiseData[$topic['contentID']]['name'];
} else {
unset($allTopics[$key]);
}
}
echo "<pre>";
print_r($allTopics);
?>

Answer 4

foreach ($allTopics as $key => &$topic) {
$contentInfo = [
'contentStatus' => $topic['contentStatus']
];
$topic['contentName'] = isset($idWiseData[$topic['contentID']]['name']) ? $idWiseData[$topic['contentID']]['name'] : null;
if (is_null($topic['contentName'])) {
unset($topic['contentName']);
}
}
USE THIS CODE THIS MIGHT SOLVE YOUR PROBLEM.