I have a page (index.php) that takes a GET
variable from the URL and checks it for security purposes. This GET
variable should only be an integer. I am using the following code to check this, but in all instances, integer or not, I get the index.php page. The header never appears. After this code, the rest of the page appears starting with the html
tag.
PHP:
<?php ob_start(); session_start(); $q=trim($_GET['q']); if (!is_numeric($q)){ header("HTTP/1.0 404 Not Found"); } ?>
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Answer
It won’t be an integer if it’s passed in a query string.
Try is_numeric()