Php数组 - 无法从数组中获取值[关闭]

Question

$data = '{"name":"CocaCola","price":1,"sync":0,"id":10792}';
$data = json_decode($data);

print_r((array)$data);
//Array ( [name] => CocaCola [price] => 1 [sync] => 0 [id] => 10792 )

print_r((array)$data["id"]);
//nothing?

This piece of code is not logic for me. Can I get any explanation of this behaviour and how to fix it?

Answer 1

(array)$data["id"]

This is executed as

(array)($data["id"])

I.e. the result of $data['id'] is cast to an array; not $data cast to an array and then its id index accessed.

If you want an array, use json_decode(..., true). Otherwise work with objects as objects instead of casting them to arrays all the time over and over.