This only strips out illegal characters, no validation is done!
The allowed characters are: a-z A-Z 0-9 $ - _ . + ! * ' () , { } | \ ^ ~ [ ] ` < > # % " ; / ? : @ & =
<?php
$flags = array();
$filter = FILTER_SANITIZE_URL;
include 'presentations/slides/input-filter/render-form.php';
include 'presentations/slides/input-filter/check-data.php';
?>
Output