Question

I have a function, ‘redirect_to()’ written on php script that is called after a successful update to a page on my custom CMS. It works fine on the localhost, but when I try it on my actual live domain I get the following error message:

Warning: Cannot modify header information – headers already sent by (output started at /hermes/bosweb/web119/b1192/ipg.typaldosnetcom/edit_listing.php:7) in /hermes/bosweb/web119/b1192/ipg.typaldosnetcom/includes/functions.php on line 20

Here is the code for the redirect_to() function:

function redirect_to ($location = NULL) {
    if ($location != NULL) {
        header("Location: {$location}");
        exit;
    }
}

I’ve made sure to call the function before I output any HTML, so I’m not sure what the problem really is.

My question: Why am I receiving this error?

Answer 1

you already sent your output to the page before you set the header. first you need to set the headers and then can the output come.

It can even be a whitespace.