Conditional redirect based on drop-down

// http://www.gravityhelp.com/forums/topic/conditional-redirect-2#post-80796
// change the 1 here to your form ID if you are not using form 1
add_filter('gform_confirmation_1', 'conditional_confirmation', 10, 4);

function conditional_confirmation($confirmation, $form, $lead, $ajax){
    // change the 1 here to your field if the unit numbers not field 1
    $url = get_bloginfo();    // set a reasonable default in case we forget a unit
    switch($lead[1]) {
        case 'P0003':
            $url = "http://google.com/?q=P0003";
            break;
        case 'P0097':
            $url = "http://www.ask.com/whatever";
            break;
        case 'P0224':
            $url = "http://maps.google.com/?q=P0224";
            break;
        case 'P0438':
            $url = "http://google.com/?q=P0003";
            break;
        case 'P0883':
            $url = "http://example.com/some-page/";
            break;
        case 'P0925':
            $url = "http://example.org/somthing-for-P0925";
            break;
        case 'P0956':
            $url = "http://web.com/whatever-for-unit-956";
            break;
        case 'P0976':
            $url = "http://google.com/";
            break;
        case 'P1173':
            $url = site_url();
            break;
        case 'P1179':
            $url = "http://whitehouse.gov/help";
            break;
        case 'P1454':
            $url = site_url() . '/whichever-url-for-this-unit/';
            break;
        case 'P3461':
            $url = "http://yahoo.com/news";
            break;
    }
    $confirmation = array('redirect' => $url);
    return $confirmation;
}