- json_decode: documentation ( source)
- array_merge_recursive: documentation ( source)
- print_r: documentation ( source)
<?php
$_GET = [
'myserver' => [
'state'=>'10'
]
];
$existingJson = '{
"key1": "val1",
"key2": "val2"
}';
$array = json_decode($existingJson, true);
$newArray = array_merge_recursive($array, $_GET);
print_r($newArray);