set ( 'HTML.Doctype', 'HTML 4.01 Strict' ); $config->set ( 'HTML.Allowed', 'b,a[href],br' ); $config->set ( 'CSS.AllowTricky', true ); $config->set ( 'URI.Disable', true ); $serial = $config->serialize (); $result = unserialize ( $serial ); $purifier = new HTMLPurifier ( $result ); echo htmlspecialchars ( $purifier->purify ( 'Bold
no formatting' ) );