web - added login via steam

website/steamauth/steamauth.php

@@ -0,0 +1,75 @@
+<?php
+ob_start();
+session_start();
+
+function logoutbutton() {
+	echo "<form action='' method='get'><button class='btn btn-secondary' name='logout' type='submit'>Logout</button></form>"; //logout button
+}
+
+function loginbutton($buttonstyle = "square") {
+	$button['rectangle'] = "01";
+	$button['square'] = "02";
+	$button = "<a href='?login'><img src='https://steamcommunity-a.akamaihd.net/public/images/signinthroughsteam/sits_".$button[$buttonstyle].".png'></a>";
+	
+	echo $button;
+}
+
+if (isset($_GET['login'])){
+	require 'openid.php';
+	try {
+		require 'SteamConfig.php';
+		$openid = new LightOpenID($steamauth['domainname']);
+		
+		if(!$openid->mode) {
+			$openid->identity = 'https://steamcommunity.com/openid';
+			header('Location: ' . $openid->authUrl());
+		} elseif ($openid->mode == 'cancel') {
+			echo 'User has canceled authentication!';
+		} else {
+			if($openid->validate()) { 
+				$id = $openid->identity;
+				$ptn = "/^https?:\/\/steamcommunity\.com\/openid\/id\/(7[0-9]{15,25}+)$/";
+				preg_match($ptn, $id, $matches);
+				
+				$_SESSION['steamid'] = $matches[1];
+				if (!headers_sent()) {
+					header('Location: '.$steamauth['loginpage']);
+					exit;
+				} else {
+					?>
+					<script type="text/javascript">
+						window.location.href="<?=$steamauth['loginpage']?>";
+					</script>
+					<noscript>
+						<meta http-equiv="refresh" content="0;url=<?=$steamauth['loginpage']?>" />
+					</noscript>
+					<?php
+					exit;
+				}
+			} else {
+				echo "User is not logged in.\n";
+			}
+		}
+	} catch(ErrorException $e) {
+		echo $e->getMessage();
+	}
+}
+
+if (isset($_GET['logout'])){
+	require 'SteamConfig.php';
+	session_unset();
+	session_destroy();
+	header('Location: '.$steamauth['logoutpage']);
+	exit;
+}
+
+if (isset($_GET['update'])){
+	unset($_SESSION['steam_uptodate']);
+	require 'userInfo.php';
+	header('Location: '.$_SERVER['PHP_SELF']);
+	exit;
+}
+
+// Version 3.2
+
+?>