Get current URL/URI without some of $_GET variables

echo Yii::$app->request->url;

In Yii2 you can do:

use yii\helpers\Url;
$withoutLg = Url::current(['lg'=>null], true);

More info:

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Yii2

Url::current([], true);
or

Url::current();

## Yii 1
Yii::app()->request->url

## For Yii2:
Yii::$app->request->url

For Yii2:
This should be safer `Yii::$app->request->absoluteUrl` rather than `Yii::$app->request->url`

Yii 1
-----

Most of the other answers are wrong. The poster is asking for the url WITHOUT (some) $_GET-parameters.

Here is a complete breakdown (creating url for the currently active controller, modules or not):

// without $_GET-parameters
Yii::app()->controller->createUrl(Yii::app()->controller->action->id);

// with $_GET-parameters, HAVING ONLY supplied keys
Yii::app()->controller->createUrl(Yii::app()->controller->action->id,
array_intersect_key($_GET, array_flip(['id']))); // include 'id'

// with all $_GET-parameters, EXCEPT supplied keys
Yii::app()->controller->createUrl(Yii::app()->controller->action->id,
array_diff_key($_GET, array_flip(['lg']))); // exclude 'lg'

// with ALL $_GET-parameters (as mensioned in other answers)
Yii::app()->controller->createUrl(Yii::app()->controller->action->id, $_GET);
Yii::app()->request->url;

When you don't have the same active controller, you have to specify the full path like this:

Yii::app()->createUrl('/controller/action');
Yii::app()->createUrl('/module/controller/action');

Check out the Yii guide for building url's in general:

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**For Yii1**

I find it a clean way to first get the current route from the CUrlManager, and then use that route again to build the new url. This way you don't 'see' the baseUrl of the app, see the examples below.

Example with a controller/action:
```
GET /app/customer/index/?random=param
$route = Yii::app()->urlManager->parseUrl(Yii::app()->request);
var_dump($route); // string 'customer/index' (length=14)
$new = Yii::app()->urlManager->createUrl($route, array('new' => 'param'));
var_dump($new); // string '/app/customer/index?new=param' (length=29)
```

Example with a module/controller/action:
```
GET /app/order/product/admin/?random=param
$route = Yii::app()->urlManager->parseUrl(Yii::app()->request);
var_dump($route); // string 'order/product/admin' (length=19)
$new = Yii::app()->urlManager->createUrl($route, array('new' => 'param'));
var_dump($new); string '/app/order/product/admin?new=param' (length=34)
```

This works only if your urls are covered perfectly by the rules of CUrlManager :)

For Yii2
========

I was rather surprised that the correct answer for Yii2 was in none of the responses.

The answer I use is:

Url::to(['']),

You can also use:

Url::to()

...but I think the first version makes it more obvious that your intention is to generate a url with the curent request route. (i.e. "/index.php?admin%2Findex" if you happened to be running from the actionIndex() in the AdminController.

You can get an absolute route with the schema and domain by passing true as a second parameter, so:

Url::to([''], true)

...would return something like "https://your.site.domain/index.php?admin%2Findex" instead.