how window.location having again redirect in php file?

Question

I am using the JS window.location as:

window.location.href = "my_url.php?param=1"

my_url.php having again redirect using header() function.

If param=1 I am having code for download CSV , otherwise redirect to other URL.

UPDATE:

Redirect using JS:

    // Download CSV 
$( '#download_csv' ).on( 'click', function() {
        window.location.href ="my_url.php?param=1"; //  param is dynamic will be sent or not
    });

my_url.php

    if($param == 1)
    {
        //CODE for download CSV, It works fine as intended
    }
    else
    {
        header("Location:other_page.php");//no actual redirect happens, instead I got ajax output of other_page.php    
        exit;
    }

Problem: whatever the output of other_page.php it will get printed but my Addressbar is having the URL of my_url.php

Answer 1

If you want to check param in my_url.php and according to it if you have to redirect then check param using $_GET then apply redirection

my_url.php

$param = (isset($GET['param']))?GET['param']:"";
if($param == 1)
{
    //CODE for download CSV, 
}
else
{
    header("Location:other_page.php");//redirect to other page
    exit;
}