- var_dump: documentation ( source)
- json_decode: documentation ( source)
- array_merge: documentation ( source)
<?php
$a = ['a', 'b', 'c', 'idx' => 'kek'];
$b = [1, 2, 3];
var_dump(array_merge($a, $b));
var_dump(json_decode('{"a": 34}', true));
var_dump($a['idx'] ?? null);
var_dump(openssl_get_cert_locations());
?>