Using php header Location to exchange messages between pages with POST - php

Question

I am using already this code:
<?php
// [...]
ELSE IF(isset($_GET['msg'])){
echo "<div id='noticePanel' class='panel panel-success'><div class='panel-heading'>
<h2 class='panel-title'>Good job!</h2></div>
<div class='panel-body'><h4>".addslashes(strip_tags(trim(#$_GET[msg])))."</h4></div></div>";
}
//[...]
?>
Which is called from other pages if some operation goes well:
if ($result){
header("Location:index.php?msg=DB updated succesfully");
exit;
}
BUT as you may imagine, it is not clean. Working, but not the best.
Can anybody tell me if I should move it to a POST request or if this code is "widely" used to exchange status messages between pages?
And, in case of the POST, can someone write down some code or redirect me to a page where this is explained well? I searched already of course, I found THIS from mozilla, THIS with jquery and in general searching "send post php header" on google.
But I just can't understand how to do it.
Thanks a lot guys!

Answer 1

Because you prefer to keep your code pure
i just suggest you to do not send the message in GET/POST
just send the status like
index.php?status=success
then check the status in result file
if(isset($_GET['status']) AND $_GET['status'] == success){
echo "bla bla";
}elseif(isset($_GET['status']) AND $_GET['status'] == fail){
echo "bla bla";
}else{
//do something
}
EDIT
If you have many messages, then you can create array
$message = [
'success' => 'success message here',
'fail' => 'failmessage here',
'notFound' => 'not found message'
];
$status = ( isset($_GET['status']) AND
isset($message[$_GET['status']]) )?$_GET['status']:'notFound';
echo $message[$status];

Answer 2

I think i'm going to go with this: PHP. How to pass variable and auto redirect to another PHP file
<?php
session_start();
$id = $user_profile['id'];
$_SESSION['id'] = $id;
header('Location: checkIfExsists.php');
?>
And on the checkIfExsists.php page, retrieve the variable so:
<?php
session_start();
$id = $_SESSION['id'];
?>
New code
session_start()
// [...]
ELSE IF(isset($_GET['msg'])){
echo "<div id='noticePanel' class='panel panel-success'><div class='panel-heading'>
<h2 class='panel-title'>Good job!</h2></div>
<div class='panel-body'><h4>".addslashes(strip_tags(trim(#$_SESSION['msg'])))."</h4></div></div>";
}
And..
session_start();
if ($result){
$_SESSION['msg'] = "DB updated!";
header("Location:index.php?msg");
exit;
}