Разделение обработчика и формы

<form id="yw0" action="token.php" method="POST">
<div class="input-group">
 
    <span class="input-group-btn">
       
         <a class="btn bg-blue open-auth-window" href="https://oauth.vk.com.....response_type=token" target="_blank" title="Получить ключ"> Получить ключ</a>
    
        
    </span>
 
    <input class="form-control" placeholder="Содержимое адресной строки" name="token" type="text">
    <img src = "captcha.php"/></center></center>
 <input type = "text" name = "kapcha" placeholder="required" >
    <span class="input-group-btn">
    
        <input class="btn bg-blue" type="submit" value="Установить">    </span>
    
 
</div>
</form>

<?php
require 'db.php';
session_start();
mysql_connect(DB_HOST, DB_LOGIN, DB_PASSWORD) or die (mysql_error ());
mysql_select_db(DB_NAME) or die(mysql_error());
$res = mysql_query("SELECT COUNT(id) FROM base");
$row = mysql_fetch_row($res);
$total = $row[0];
 
If (isset($_POST['token'])){
 
if($_POST['kapcha'] != $_SESSION['rand_code'])echo"";
else {
mysql_connect(DB_HOST, DB_LOGIN, DB_PASSWORD) or die (mysql_error ());
mysql_select_db(DB_NAME) or die(mysql_error());
$tok = htmlspecialchars($_POST['token']);
$token =  explode("access_token=",$tok);
$token2 = explode("&",$token[1]);
$sql = "INSERT INTO base(id,token) VALUES('','$token2[0]')";
 
mysql_query($sql) or die(mysql_error());
echo '<script type="text/javascript"> alert("ВСЕ ОК"); </script>';
 
}
}
?>

<?php
    define('DB_HOST', 'localhost');
    define('DB_LOGIN', '');
    define('DB_PASSWORD', '');
    define('DB_NAME', '');
    mysql_connect(DB_HOST, DB_LOGIN, DB_PASSWORD) or die (mysql_error ());
mysql_select_db(DB_NAME) or die(mysql_error());
 
?>

header('Location:index.php');