scratchings-php/ajax.php

<?php

if (is_ajax()) {
	// if (isset($_POST["venue"]) && !empty($_POST["venue"])) { //Checks if action value exists
		// $action = $_POST["action"];
		// switch ($action) { //Switch case for value of action
		//	case "test":
				test_function();
		//		break;
		//}
	// }
}

//Function to check if the request is an AJAX request
function is_ajax()
{
	return True;
	// return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest';
}

function test_function()
{
	$return = $_GET;

	//Do what you need to do with the info. The following are some examples.
	//if ($return["favorite_beverage"] == ""){
	//  $return["favorite_beverage"] = "Coke";
	//}
	$return["favorite_restaurant"] = "McDonald's";

	$return["json"] = json_encode($return);
	echo $_GET['callback'] . '(' . json_encode($return ). ')';
}