Override core helper Url.php

Yii 2.0 General Discussions
1

I’m trying to override the helper class Url here is my code in common\components\helpers\Url.php

namespace common\components\helpers;

use Yii;

class Url extends \yii\helpers\Url
{

...

}

and in my entry script index.php

require __DIR__ . '/../../vendor/autoload.php';
require __DIR__ . '/../../vendor/yiisoft/yii2/Yii.php';
Yii::$classMap['yii\helpers\Url'] = __DIR__ . '/../../common/components/helpers/Url.php';

but when i load my page i get this error

Class "yii\helpers\Url" not found

What am i missing? Thank you.

2

never mind got! had to extend BaseUrl

class Url extends BaseUrl {
...
}