Issue #30: Fixes database_prefix option during install

qrcode/install/includes/database_class.php

@@ -31,7 +31,7 @@ class Database {
 	}
 
 	// Function to create the tables and fill them with the default data
-	function create_tables($db_host, $db_user, $db_password, $db_name, $db_port)
+	function create_tables($db_host, $db_user, $db_password, $db_name, $db_port, $db_prefix)
 	{
 		// Connect to the database
         $mysqli = new mysqli($db_host,$db_user,$db_password,$db_name, $db_port);
@@ -43,6 +43,9 @@ class Database {
 		// Open the default SQL file
 		$query = file_get_contents('sql/sample_data.sql');
 
+        // Run prefix regex; if none is set, then it will replace #prefix# with an empty string.
+        $query = preg_replace('/#prefix#/', $db_prefix, $query);
+
 		// Execute a multi query
 		$mysqli->multi_query($query);