How to redirect to a particular previous state of my page using $_GET varialble

Question

So, I am currently on a page.

adminpanel.php?type=pdetail&id=1&op=edit

each of my variables create a some part of my page by echoing out HTML tags. I want my page to redirect to

adminpanel.php?type=edit

(my type variable was already defined as "pdetail" I want it to modified to "edit")

if($op == 'edit')
{
    $id = $_GET['id'];
    echo("Testing IF condition");
    header("location:adminpanel.php?type=edit");
}

you're outputting before header right now; remove the echo statement. Error reporting will tell you that http://php.net/manual/en/function.error-reporting.php — Funk Forty Niner, May 27 '15 at 15:50

score 1 · Accepted Answer · edited May 23 '17 at 10:26

As I mentioned in comments, you're outputting before headers (see "References" below). There should not be any output before that, including one or more spaces before the opening <?php tag, HTML, cookies, etc., or anything that would cause an error.

This is covered in the link I have provided for you below, under "References".

Remove the "echo" statement.

Whether you saw my comment or not is unknownst to me, and am submitting the following answer.

If error reporting were set/on on your server, you would be receiving a warning similar to this:

Warning: Cannot modify header information - headers already sent by (output started at /var/user/you/folder/adminpanel.php:12) in /var/user/you/folder/adminpanel.php on line x

Tested with the following and added some code that you left out in your question, proved to be successful.

<?php 
$op = $_GET['op'];

    if($op == 'edit')
    {
        $id = $_GET['id'];
        header("location:adminpanel.php?type=edit");
        exit;
    }

Sidenote: It's best to add exit; after header, should there be more code following that. Otherwise, your code may want to continue executing.

References:

Error reporting:

Add error reporting to the top of your file(s) which will help find errors.

<?php 
error_reporting(E_ALL);
ini_set('display_errors', 1);

// rest of your code

Sidenote: Error reporting should only be done in staging, and never production.

How to redirect to a particular previous state of my page using $_GET varialble

1 Answers1