I have this script that collects data from users and I wanted to check their data for malicious code like XSS and SQL injections by using HTML Purifier http://htmlpurifier.org/ but how do I add it to my php form submission script?
Here is my HTML purifier code
require_once '../../htmlpurifier/library/HTMLPurifier.auto.php';
$config = HTMLPurifier_Config::createDefault();
$config->set('Core.Encoding', 'UTF-8'); // replace with your encoding
$config->set('HTML.Doctype', '
XHTML 1.0 Strict'); // replace with your doctype
$purifier = new HTMLPurifier($config);
$clean_html = $purifier->purify($dirty_html);
Here is my PHP form submission code.
if (isset($_POST['submitted'])) { // Handle the form.
$mysqli = mysqli_connect("localhost", "root", "", "sitename");
$dbc = mysqli_query($mysqli,"SELECT users.*, profile.*
FROM users
INNER JOIN contact_info ON contact_info.user_id = users.user_id
WHERE users.user_id=3");
$about_me = mysqli_real_escape_string($mysqli, $_POST['about_me']);
$interests = mysqli_real_escape_string($mysqli, $_POST['interests']);
if (mysqli_num_rows($dbc) == 0) {
$mysqli = mysqli_connect("localhost", "root", "", "sitename");
$dbc = mysqli_query($mysqli,"INSERT INTO profile (user_id, about_me, interests)
VALUES ('$user_id', '$about_me', '$interests')");
}
if ($dbc == TRUE) {
$dbc = mysqli_query($mysqli,"UPDATE profile
SET about_me = '$about_me', interests = '$interests'
WHERE user_id = '$user_id'");
echo '<p class="changes-saved">Your changes have been saved!</p>';
}
if (!$dbc) {
// There was an error...do something about it here...
print mysqli_error($mysqli);
return;
}
}
