几秒钟后如何重定向父页面

Question

I am making a page in which there is a submit button. When I click it, it redirects to karloshopping.php and opens in a new tab.

How to redirect to the parent page after some seconds to some other page?

    <form class="lele" id="lele" name="lele" method="post" action='karloshopping.php?param=<?php echo $_SESSION['user_id'] ?>' target=_blank>
        <input type="submit" value="I Understand,Visit the Retailer" id="lelebtn" class="buttom" name="lelebtn" /><br/>
    </form>
</div>
<?php
if(isset($_POST['lelebtn'])){

}
?>

Answer 1

If I've understood you correctly, try redirecting to an empty page at first, something like action = "empty.php" and then on that empty page give the header like

<?php
header("refresh:5; url=parentpage.php");
echo"you will now be redirected to parentpage.php in 5 seconds..";
?>

EDIT:

After reading your comment, you could try something like this too;

 <form class="lele" id="lele" name="lele" method="post" action='karloshopping.php?param=<?php echo $_SESSION['user_id'] ?>' target=_blank>
        <input type="submit" value="I Understand,Visit the Retailer" id="lelebtn" class="buttom" name="lelebtn" /><br/>
            </form>
        </div><?php
        if(isset($_POST['lelebtn'])){



        }
        ?>

In your karloshopping.php do something like I did above:

<?php
    header("refresh:5; url=parentpage.php");
    echo"you will now be redirected to parentpage.php in 5 seconds..";
    ?>

You could also use a JavaScript fucntion:

<script type="text/javascript">
    function reDirectit()
    {
    var url = "http://www.stackoverflow.com";
    window.location(url);
    }
    </script>

After our discussion, I think this is exactly what you are looking for;

<script type="text/javascript">
function redirect()
{
window.location.href="pagez.php";

}
</script>
<form method = "post" action = "pagey.php" target = "_blank">
<input type="submit" value="Go" onClick = "return redirect();" />
</form>

Answer 2

setTimeout(function(){
    window.location.href = "pagez.php";
}, 8000);

8000 means 8 seconds. You can set as per your requirements.