基于URL参数重定向，如果URL参数在表行中可用 - PHP MySQL

Question

I have a table where one of the attribute is version.

The table name is versions.

I want to redirect users to a default page if the URL parameter also called version is NULL or not present, and if the version value is not in my table.

So far I've this. It does not work.

$stonevar = isset($_GET['version']) ? $_GET['version'] : NULL;

if (empty($stonevar)) {
header("Location: index.php?version=default");
 }

$id = $_GET['version'];
$result = $db->query("SELECT * FROM `versions` WHERE version='$id'");

 while ($row = $result->fetch_assoc()) {
  $varex = $row['version'];
 }

if ($varex == NULL) {
header("Location: index.php?default");
}

Answer 1

You have to add exit(); after header function.

Try Something like:

  <?php
    $stonevar = isset($_GET['version']) ? $_GET['version'] : NULL;

    if (empty($stonevar)) {
    header("Location: index.php?version=default");
    exit();
     }

    $result = $db->query("SELECT * FROM `versions` WHERE version='$stonevar'");

     while ($row = $result->fetch_assoc()) {

    header("Location: index.php?".$row['version']);
    exit();
/*
* or something you want to do if version exist
*/
     }

    header("Location: index.php?default");
    exit();
    ?>