I have a question and I need help with my json and php. I use foreach loop to get the object number from my json. And when I get data from mark of mastery it displays like 13423452623423 I want to display it as 14 not 13423452623423. I just want to display how many number of digits but how do I do that?

```html
<?php
$player_vehicles = file_get_contents("https://api.worldoftanks." . $_GET["server"] . "/wot/tanks/stats/?application_id=demo&account_id=" . $account_id);

$vehicles_player = json_decode($player_vehicles, TRUE);
foreach ($vehicles_player['data'][$account_id] as $tank_id) {
echo $tank_id['mark_of_mastery'];
}
?>
```