5

Show Output and Redirect No JS

Derek Jones edited this page 2012-07-05 13:58:23 -07:00

In a project I am working on I wanted to be able to do a redirect that would allow output to be displayed to the user before redirecting; but I didn't want to use Javascript.

The CI redirect function in the URL helper did the majority of the work; all I had to do was make a couple of slight modifications.

As you can see in the original code

if ( ! function_exists('redirect'))
{
    function redirect($uri = '', $method = 'location', $http_response_code = 302)
    {
        if ( ! preg_match('#^https?://#i', $uri))
        {
            $uri = site_url($uri);
        }
        
        switch($method)
        {
            case 'refresh': header("Refresh:0;url=".$uri);
                break;
            default: header("Location: ".$uri, TRUE, $http_response_code);
                break;
        }
        exit;
    }
}

The function simply exits the entire script and doesn't allow for you to show any output, nor give it any kind of delay.

For my solution I created MY_url_helper.php in applications/helpers with the following:

/**
 * Header Redirect
 * 
 *
 * Header redirect in two flavors
 * For very fine grained control over headers, you could use the Output
 * Library's set_header() function.
 *
 * @access    public
 * @param    string    the URL
 * @param    string    the method: location or redirect
 * @param    int    the response code to be sent to the browser
 * @param    int    time in seconds to delay the redirect
 * @param    bool    true/false if the function should exit the CI kernel
 * @return    string
 */

if ( ! function_exists('redirect')) {
    function redirect($uri = '', $method = 'location', $http_response_code = 302,$time=0,$exit=true) {
    if ( ! preg_match('#^https?://#i', $uri)) {
        $uri = site_url($uri);
    }
    
    switch($method) {
        case 'refresh':
            header("Refresh:$time;url=".$uri);
        break;
        default: header("Location: ".$uri, TRUE, $http_response_code);
        break;
    }
    if($exit === false) // i chose to use false here to make sure the programmer actually enters false in the function call.
        return;
    else
        exit;
    }
}

Simple enough. By default the function will redirect in 0 seconds, exit and not break any existing usage. My desire for this functionality came from wanting to forward a user automatically to their control panel the first time they ever logged into my site, while also giving them the ability to override that by clicking elsewhere on the page.