Could not remove key value from associative array using PHP

Question

I am trying to remove the key value from one associative array using PHP but it could not working as expected. I am explaining my code below.

<?php
$resultArr=array(array("stars"=>"3","starcount"=>3),array("stars"=>"4","starcount"=>4),array("stars"=>"5","starcount"=>5));
foreach ($resultArr as $key => $value) {
    if (array_key_exists("stars", $value)) {
        unset($value['stars']);
    }
}
echo json_encode($resultArr);
?>

Here I need to remove all stars key and its value from json array but my code is not working as expected.

Answer 1

Try this

$resultArr=array(array("stars"=>"3","starcount"=>3),array("stars"=>"4","starcount"=>4),array("stars"=>"5","starcount"=>5));
foreach ($resultArr as $key => $value) {
    if (array_key_exists("stars", $value)) {
        unset($resultArr[$key]['stars']);
    }
}
echo json_encode($resultArr);

Explaination

You should unset key from $resultArr array by using $key

Answer 2

To separate Key and Value:

foreach ($resultArr as $key => $value) {
 echo $key;
 echo $value
}

Answer 3

Foreach statement copies value and it means $value variable has a copy of element instead original element. You can use access by key to direct access to element of array, for example:

foreach ($resultArr as $key => $value) {
    if (array_key_exists("stars", $value)) {
        unset($resultArr[$key]['stars']);
    }
}

Also, you can use references

foreach ($resultArr as $key => &$value) {
    if (array_key_exists("stars", $value)) {
        unset($value['stars']);
    }
}