ReturnUrl helper for tab-aware nested redirection in Yii2.
You might be saying, Yii2 already handles a returnUrl perfectly fine with the
Url::previous() methods. Why not use those?
These methods store the returnUrl into a single variable in the users session. This becomes a flaw when we have multiple tabs open. Take the following scenario:
The solution is to pass the returnUrl into the GET and POST request by embedding it into your links and forms. This extension makes it very easy to do and solves many common problems including the maximum length of a GET request.
ReturnUrl uses cache to store URL to Token mapping. Due to this you must have a cache component in your config, for example:
$config = [ 'components' => [ 'cache' => [ 'class' => 'yii\caching\FileCache', ], ], ],
The preferred way to install this extension is through composer.
$ composer require cornernote/yii2-returnurl "*"
require section of your
ReturnUrl::getToken() - Creates and returns a new token. Pass this into the request to mark the current page as the origin url.
ReturnUrl::getRequestToken() - Returns the current token. Pass this into the request to allow multiple pages to be visited before returning to the origin url.
ReturnUrl::getUrl($altUrl) - Return the origin url or
$altUrl if no token was found in the request data. Use this value to redirect to the origin url.
Your user is on a search results page, and you have a link to an update form. After filling in the form you want the user to be returned to the page they started from.
On the start page, add a
ReturnUrl::getToken() to your link. This will set the current page as the origin url. For example in
// generate a returnUrl link value Html::a('edit post', ['post/update', 'id' => $post->id, 'ru' => ReturnUrl::getToken()]);
On the update page, add a
ReturnUrl::getRequestToken() to your form. This will pass the existing token through to the next page so that the controller can redirect to the origin url after it successfully saves. For example in
// generate a returnUrl form value Html::hiddenInput('ru', ReturnUrl::getRequestToken());
In the controller action that handles the form, change the call to
$this->redirect(ReturnUrl::getUrl($url)). This redirects the user to the origin url. For example in
// this is where we used to redirect to, we use it as a fail-back // (if not provided then we redirect to the home page) $altUrl = ['post/index']; return $this->redirect(ReturnUrl::getUrl($altUrl));