GetValue.php

<?php

require 'db.php';
$arrayData  = json_decode($_POST['arrayData'], true);

//echo "\n" . displayRecursiveResults($arrayData) . "\n";
$playerID = $arrayData['uid'];

if(!isset($playerID)){
    echo "Fail data";
    exit;
}
else {
    GetValue($playerID);
}

function displayRecursiveResults($arrayObject) {
    foreach($arrayObject as $key=>$data) {
        if(is_array($data)) {
            displayRecursiveResults($data);
        } elseif(is_object($data)) {
            displayRecursiveResults($data);
        } else {
            echo $key." => ".$data."\n";
        }
    }
}

function GetValue($playerID) {
    $user_data = R::findOne('users', 'UID = ?', [$playerID]);
    if (isset($user_data)) {
        $array = $user_data->export();
        echo json_encode($array);
    }
    else {
        echo "Not find this user";
    }
}
?>