Code:
<?php 
define('DB_NAME','form1');
define('DB_USER','root');
define('DB_PASSWORD',' ');
define('DB_HOST','localhost');

 $link = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
  if (!$link)
  {
  die('could not connect:'. mysql_error());
  }
  $db_selected=mysql_select_db(DB_NAME,$link);
  if(!$db_selected)
  {
  die('cant use'.DB_NAME.':'mysql.error());
...