Get Current URL from a PHTML - Magento 2

It's working for me

$this->getUrl('*/*/*', ['_current' => true, '_use_rewrite' => true])

Also instead $this you can use $block.

To do so you will need to use a custom block from a module and do the following:

In Magento 2, you can use the \Magento\Store\Model\StoreManagerInterface which is stored in an accessible variable $_storeManager for every class extending \Magento\Framework\View\Element\Template so most of the block classes (Template, Messages, Redirect block types but not Text nor TextList).

This way in your block, you can create the following method to get the current URL:

public function getCurrentUrl() {
    return $this->_storeManager->getStore()->getCurrentUrl();
}

Once you've done that you can call the following in your template:

$block->getCurrentUrl();

$block->getRequest()->getUriString();