如何使用ajax和jquery重定向URL?

我正在尝试在数据提交上重定向URL.这是我的PHP代码:

I am trying redirect URL on data submit. Here is my PHP code:

<?php
        $error = array();

        $user_id=$_SESSION['email'];
        $apply_id=$_SESSION['id'];      

        $purpose_amount=$_POST['purpose_amount'];
        $amount=$_POST['amount'];
        $cheque_name=$_POST['cheque_name'];

        if(empty($amount)){
            $error[] =  "Please Enter Expected Amount";
        }
        elseif(empty($cheque_name)){
            $error[] =  "Please Enter Issue Cheque in Favour of";
        }
        if (count($error)) {
            echo "<i class='fa fa-exclamation'> ";
            echo implode('<br>', $error);
            echo "</i>";
        }
        else{
            $result=mysqli_query($conn, "UPDATE education SET amount='$amount', cheque_name='$cheque_name', purpose_amount='$purpose_amount', date='$date' WHERE id='$apply_id'")or die("Could not insert data: " .mysqli_error($conn));
                echo 1;         
        }
?>

这是JQuery和AJAX代码:

And here is JQuery and AJAX code:

$('.btn_education_step5').click(function(){            
        var formdata=new FormData($('#education_step5')[0]);
        $.ajax({
            url:'includes/backend_education_amount.php',
            method: "POST",
            async: false,
            cache: false,
            contentType: false,
            processData: false,
            data : formdata,
            success:function(answer_from_actionpage){               
                if(answer_from_actionpage == 1){                    
                  Redirect url code??????
                }else{
                    $('.error').html(answer_from_actionpage);
                }
            }
        })
});

提交数据后，我想重定向URL，例如abc.php?id=$user_id 我可以在success:function()中做些什么来重定向URL.

When my data is submitted I want to redirect URL like this abc.php?id=$user_id What can I do in success:function() to redirect URL.