add saving registrations to sqlite

database.php

@@ -0,0 +1,29 @@
+<?php  
+$db_file = "db_file.sqlite"; 
+
+// create database file when not existent yet
+if (!file_exists($db_file)) { 
+ $db = new PDO('sqlite:' . $db_file); 
+ $db->exec("CREATE TABLE registrations(
+  id INTEGER PRIMARY KEY AUTOINCREMENT, 
+  first_name TEXT,
+  last_name TEXT,
+  username TEXT,
+  note TEXT,
+  email TEXT,
+  verify_token TEXT,
+  request_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP)"); 
+} 
+else { 
+ // establish connection 
+ $db = new PDO('sqlite:' . $db_file);
+ $ins_stmt = $db->prepare("INSERT INTO registrations
+    (first_name, last_name, note, email, username, verify_token)
+    VALUES (:first_name, :last_name, :note, :email, :username, :verify_token);
+} 
+
+// set writeable when not set already
+if (!is_writable($db_file)) {
+ chmod($db_file, 0777); 
+} 
+?>