通过htaccess重定向到另一个页面而不是index.php

Depends what you need exactly, i use cookies to redirect you at first visit. By the first visit, index.php will not find a cookie and goes to start.php

index.php:

<?php
    if (!isset($_COOKIE['MYcookie'])) {
        header("Location: ./start.php");
        exit();
    }
?>

start.php:

<?php 
  if (!empty($_POST['waarde'])) 
  {  
        setcookie ('MYcookie', 'yes', time() + 3600);
        header("Location: ./index.php");
        exit();
  }
?>

      <form method="post" action="">
      <input type="radio" name="waarde" value="1" checked="checked"><b>YES</b>
      <input type="radio" name="waarde" value="0"><b>NO</b>
      <input class="mybuttons" type="submit" value="ACCEPT">
      </form>

Try This on .htaccess file:

RewriteEngine on

RewriteCond %{HTTP_HOST} ^example\.com$ [NC]
RewriteRule ^(.*)$ http://www\.example\.com/$1 [R=301,L]

RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /([^/]+/)*index\.{htm|html|php)\ HTTP/
RewriteRule ^(([^/]+/)*)index\.(htm|html|php)$ http://example.com/$1 [R=301,L]