web: prepared webpage for publishing

* renamed admin directory to php because adblocker blocked ajax
* don't refresh page when pressing enter
* improved english
* added db_config for live page

web/mediacube/php/submit.php

@@ -0,0 +1,33 @@
+<?php
+	header('Content-type: application/json');
+	$response_array['status'] = 'error';
+
+	$email = $_POST["email"];
+	$regex = "/^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$/"; 
+	if (preg_match($regex, $email)) 
+	{
+		include("db_config.php");
+		
+		$link = new mysqli($servername, $username, $password, $dbname);
+		
+		if (mysqli_connect_errno()) 
+		{
+			exit();
+		}
+		
+		$email = mysqli_real_escape_string($link, $email);
+
+		if (mysqli_query($link, "INSERT INTO " . $tabename . " (`id`, `mail`) VALUES (0, '$email')")) 
+		{
+			$response_array['status'] = 'success';    
+		}
+		
+		$link->close();
+	}
+	else
+	{
+		$response_array['status'] = 'error_invalid_email';
+	}
+	
+	echo(json_encode($response_array));
+?>