iowebsite/staff/save_tasks.php

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $data = json_decode(file_get_contents("php://input"), true);
var_dump($data);
    // Store tasks in a flat-file database (tasks.txt)
    $ret = file_put_contents("tasks.json", json_encode($data["tasks"], JSON_PRETTY_PRINT));
    var_dump($ret);
}
?>