Get insight of the incoming http requests

request-tester.php

<?php

$request_payload = !empty($_POST) ? $_POST : array();
$request_payload = empty($_POST) && !empty($_GET) ? $_GET : $request_payload;
$request_payload = isset($_SERVER['CONTENT_TYPE'])
	&& $_SERVER['CONTENT_TYPE'] == 'application/json'
		? json_decode(file_get_contents('php://input'), true)
		: $request_payload;

$request_details = array(
	'Request Method' => $_SERVER['REQUEST_METHOD'],
	'Content-Type' => $_SERVER['CONTENT_TYPE'],
	'Request Payload' => $request_payload,
	'Accepted Content-Type' => $_SERVER['HTTP_ACCEPT'],
	'Request Timestamp' => date('r', $_SERVER['REQUEST_TIME']),
	'Client IP' => $_SERVER['REMOTE_ADDR'],
	'Server IP' => $_SERVER['SERVER_ADDR'],
	'Server Port' => $_SERVER['SERVER_PORT'],
	'Https' => $_SERVER['HTTPS']
);

$content = '<h1>Test Results</h1><h3>request-tester.php</h3>';
$content .= '<pre>' . print_r($request_details, true) . '</pre>';

header("HTTP/1.1 200");
exit($content);