index.php

<?php
//Includes
include 'config.php';
include 'functions.php';

//Get info
$user = $_POST['user'];
$password = $_POST['password'];
$lversion = $_POST['version'];

//Get variables override post variables if set
if (isset($_GET['user'])) {
	$user = $_GET['user'];
}
if (isset($_GET['password'])) {
	$password = $_GET['password'];
}
if (isset($_GET['version'])) {
	$lversion = $_GET['version'];
}
if (isset($user) && isset($password)) {//Make sure there is a username and password before authenticating
	//Check name
	$haspaid = cURL("http://minecraft.net/haspaid.jsp?user=" . $user);
	if ($haspaid == "true") {
		//They're premium, login with official MC and return a real result
		$return = cURL("https://login.minecraft.net/?user=" . $user . "&password=" . $password . "&version=" . $lversion);
	}
	elseif ($haspaid == "false") {
		//Not premium, check their info https://www.minecraft.net/login username=user&password=pass
		if (login($user, $password) == "User not premium") {
			$newSess = randSess();
			$return = $version . ":deprecated:" . $user . ":" . $newSess;
			if ($useDB == 1) {
				//Store $newSess
				storeSess($user, $newSess);
			}
		}
		else {
			//Login failed or paradox occurred
			$return = "Bad login";
		}
	}
	else {//Something went horribly wrong, reject.
		$return = "Bad login";
	}
	//Send info
	echo $return;
}
else {
	include 'news.php';
}
?>