问如何在php中随机化数组json

EN

[
    {
        "Country":"Germany",
        "male":["Andrew","Michael","John"],
        "female":["Emily","Hannah", "Mia"],
        "id":["1","2","3"]
    }
]

$f = file_get_contents("file.json");
$file = json_decode($f, true);

$gm = $file["male"];
$male = $gm[rand(0, count($gm) - 1)];

$gf = $file["female"];
$female = $gf[rand(0, count($gf) - 1)];

echo 'male'. $gm. 'female'. $gf;