How to get url in Drupal 8?

@brandy 

In Drupal 8, you can use the Drupal::request()->getUri() method to get the current URL of the page being accessed.

Here is an example of how you can use this method:

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$current_url = Drupal::request()->getUri();

You can also use the DrupalCoreUrl class to generate URLs for specific routes in your Drupal site. For example:

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use DrupalCoreUrl;

$node_url = Url::fromRoute('entity.node.canonical', ['node' => $node->id()]);
$node_url = $node_url->toString();

This will generate the URL for the canonical page of the node with the given ID.

You can also use the DrupalCoreLink class to create a link object, which you can then render as an anchor tag in your twig template. For example:

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use DrupalCoreLink;

$node_link = Link::createFromRoute($node->label(), 'entity.node.canonical', ['node' => $node->id()]);
$node_link = $node_link->toRenderable();

This will create a link object for the node with the given ID and label, which you can then render in your twig template using the {{ node_link }} variable.

I hope this helps! Let me know if you have any questions.