issue using $_GET and $_POST to echo something if a user has posted

I'm having an issue that's been driving me crazy for a while now because I just can't figure it out.

I want to echo something like "succeed" if the user creates a post from a form.

This is what i got so far in my db-querys file:

if ($_REQUEST) {
    $name           = $_REQUEST['name'];
    $price      = $_REQUEST['price'];
    $dateofevent    = $_REQUEST['dateofevent'];
    $time           = $_REQUEST['time'];
    $textinfo       = $_REQUEST['textinfo'];
    $leg            = $_REQUEST['leg'];

    $sql= $dbh->prepare("INSERT INTO events(name, dateofevent, time, price, leg, textinfo) 
    VALUE (:name, :dateofevent, :time, :price, :leg, :textinfo)");

    $sql->bindParam(':name', $name);
    $sql->bindParam(':dateofevent', $dateofevent);
    $sql->bindParam(':time', $time);
    $sql->bindParam(':price', $price);
    $sql->bindParam(':leg', $leg);
    $sql->bindParam(':textinfo', $textinfo);

    $sql->execute();

    $url = $_POST['name'];
    header('Location: events.php?'.$url);
}

Then I've tried using $_GET to echo out something if the url is correct.

This is the code in my view-file so far:

if(isset($_GET[$url])) {
    echo "success";
}

Here I get undefined variable $url and the echo doesn't work, nothing shows.

I've also tried something like:

$url = 'path/to/event.php';
if (!$_SERVER['REQUEST_URI'] == $_SERVER[$url]) {
    echo "success";
}

And here I get undefined index path/to/event.php and the echo doesn't work aswell, nothing shows.

Can anyone please help me with my problem? I'm new in php so can't get any further with this, I'm stuck.

Solution

$array = array('foo' => 'bar');
$key   = 'foo';
echo $array[$key]; // outputs 'bar'

That's what you're trying to do there, which obviously doesn't work because $url is not a defined variable. In fact, since the name value doesn't have a key in the URL it's associated with, you can't get it that way from $_GET at all.

The simplest solution for you is to add a key in the URL:

header('Location: events.php?name=' . urlencode($_POST['name']));
                             ^^^^^

and get the value by key:

$name = $_GET['name'];

It's odd though to use a user-entered name as is for a primary id to something in the database. You should rather use the autoincrementing numeric id of the record in the database.