Display PHP Request Data

resttest.php

<?php
header('content-type: application/json');
session_start();

$data = array(
//    'GLOBALS' => $GLOBALS,
  '_SERVER' => $_SERVER,
  '_GET' => $_GET,
  '_POST' => $_POST,
  '_FILES' => $_FILES,
  '_COOKIE' => $_COOKIE,
  '_SESSION' =>  $_SESSION,
  '_REQUEST' => $_REQUEST,
  '_ENV' => $_ENV,
);

echo json_encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);