How to get data from json object in laravel code example

Example 1: how get value of json encode in laravel

$json = '{"countryId":"84","productId":"1","status":"0","opId":"134"}';
$json = json_decode($json, true);
echo $json['countryId'];
echo $json['productId'];
echo $json['status'];
echo $json['opId'];

Example 2: php laravel return json response

return response()->json([
    'name' => 'Abigail',
    'state' => 'CA'
]);

Example 3: laravel json response

return response()->json([
    'name' => 'Abigail',
    'state' => 'CA',
]);

Example 4: laravel json eloquent

protected $casts = [
    'birthday' => 'date:Y-m-d',
    'joined_at' => 'datetime:Y-m-d H:00',
];