PhpAppDeveloper

Dear Experts, I'm new to php. I want to create a php web app which is hosted in Linux (Apache Server). This application shall verify the input credential against active directory authentication. Below is y src code. But this is displaying error :The website cannot display the page. I want to show either "Congratulations! $username is authenticated."; or "Access Denied!"; in my web page. Plz help <?php $ldaphost = "ldap.mycompanydomain.com"; $ldapport = 389; $ds = ldap_connect($ldaphost, $ldapport) or die("Could not connect to $ldaphost"); if ($ds) { $username = "johndoe@mycompanydomain.com"; $upasswd = "rightpassword"; $ldapbind = ldap_bind($ds, $username, $upasswd); if ($ldapbind) {print "Congratulations! $username is authenticated.";} else {print "Access Denied!";} } ?>