Add database type option

README.md

@@ -1,3 +1,7 @@
 # SimpleWordsCloud
 This site allows to create simple words cloud, without any registrations.
 There is nothing stored on the server except the words.
+
+## Database
+Database config option is set in the dbconfig.php file,
+example is in dbconfig_empty.php.

db.php

@@ -22,9 +22,7 @@ class DataBase
 	public function init()
 	{
 		require_once 'dbconfig.php';
-		$dsn = 'pgsql:dbname=' . $dbname
-			     . ';host=' . $host
-			     . ';port=' . $port;
+		$dsn = "$type:dbname=$dbname;host=$host;port=$port";
 		try {
 			$this->db = new PDO($dsn, $username, $password);
 			$this->db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

dbconfig_empty.php

@@ -1,5 +1,5 @@
 <?php
-
+$type     = 'pgsql';
 $host     = 'localhost';
 $dbname   = '';
 $username = '';