check if a querystring exists, if not create one - PHP
Maybe there are plenty of ways. You can assign value to $_GET key if one does not exist. Or if you really need to query string, you can renavigate the user to the same page with present querystring.
if (!isset($_GET['id'])) { header("Location: Page.php?id=1"); exit;}It should be before any output in the page. So if user visits Page.php or Page.php? or Page.php?someDifferentParamThanId=10 it will return false on isset($_GET['id']) thus it will redirect to Page.php?id=1
This should work:
if(isset($_GET['id'])){ //It exists}else{ //It does not, so redirect header("Location: Page.php?id=1");}
Do something like:
if(!isset($_GET['id'])){ header('LOCATION:www.mysite.co.uk/Folder1/Folder2/Page.php?id=1'); die();}