(SOLVED) add external link in custom magento plugin

Question

I'm updating a Magento plugin and I'd like to add an external link like this:

<a href="myweblink" target "_blank">My weblink </a>

I tried to do it adding these lines in layout.xml file (that is the model I use)

 <?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
<referenceContainer name="footer">
    <block class="Magento\Framework\View\Element\Html\Link\Current" name="footer_blog_link" before="-">
        <arguments>
            <argument name="label" xsi:type="string" translate="true">Condizioni di contratto e termini di utilizzo</argument>
            <argument name="path" xsi:type="string">https://www.fattura24.com/termini-utilizzo/</argument>
            <argument name="target" xsi:type="string">_blank</argument>
        </arguments>
        <arguments>
            <argument name="label" xsi:type="string" translate="true">Regolamento integrarivo (delle Condizioni di Contratto) per l'UTENTE che utilizza moduli per E-Commerce di Fattura24</argument>
            <argument name="path" xsi:type="string">https://www.fattura24.com/regolamento-ecommerce/</argument>
            <argument name="target" xsi:type="string">_blank</argument>
        </arguments>
        <arguments>
            <argument name="label" xsi:type="string" translate="true">Privacy</argument>
            <argument name="path" xsi:type="string">https://www.fattura24.com/policy/</argument>
            <argument name="target" xsi:type="string">_blank</argument>
        </arguments>
    </block>
</referenceContainer>  

I'm not displaying the links in admin footer of my extension.

I put this file in /adminhtml/layout then I updated the app, flushed magento cache, reindexed but still can't display links

Answer 1

If you want to add that in admin area:

app/code/Vendor/Modulename/view/adminhtml/layout/your_layout_name.xml

<referenceContainer name="footer">
    <block class="Magento\Framework\View\Element\Html\Link\Current" name="footer_blog_link" before="-">
        <arguments>
            <argument name="label" xsi:type="string" translate="true">Condizioni di contratto e termini di utilizzo</argument>
            <argument name="path" xsi:type="string">https://www.fattura24.com/termini-utilizzo/</argument>
            <argument name="target" xsi:type="string">_blank</argument>
        </arguments>
        ...

Answer 2

At last I solved in this way: I edited system.xml adding code like this:

<field id="info_link" translate="label" type="button" sortOrder="30" showInDefault="1" showInWebsite="1" showInStore="1">
                         <frontend_model>Fattura24\AppFatturazione\Block\System\Config\InfoLink</frontend_model>
</field> 

Then I created an InfoLink.php file:

<?php
namespace Fattura24\AppFatturazione\Block\System\Config;

class InfoLink extends \Magento\Config\Block\System\Config\Form\Field
{
    protected $_template = 'Fattura24_AppFatturazione::system/config/infoLink.phtml';

    public function __construct
    (
        \Magento\Backend\Block\Template\Context $context,
        \Magento\Framework\ObjectManagerInterface $objectManager,
        array $data = []
    )
    {
        $this->objectManager = $objectManager;
        $this->storeManager = $context->getStoreManager();
        parent::__construct($context, $data);
    }

    /**
     * Remove scope label
     *
     * @param  AbstractElement $element
     * @return string
     */
    public function render(\Magento\Framework\Data\Form\Element\AbstractElement $element)
    {
        $element->unsScope()->unsCanUseWebsiteValue()->unsCanUseDefaultValue();
        return parent::render($element);
    }

    /**
     * Return element html
     *
     * @param  AbstractElement $element
     * @return string
     */
    protected function _getElementHtml(\Magento\Framework\Data\Form\Element\AbstractElement $element)
    {
        return $this->_toHtml();
    }

Eventually I added the template named infoLink.phtml:

<?php echo "<a href=\"https://www.fattura24.com/termini-utilizzo/\" target=\"_blank\">Condizioni di contratto e termini di utilizzo di Fattura24</a>" . "<br />";
      echo "<a href=\"https://www.fattura24.com/regolamento-ecommerce/\" target=\"_blank\">Regolamento F24 integrativo (delle Condizioni di Contratto) per modulo Magento </a>" . "<br />";
      echo "<a href=\"https://www.fattura24.com/policy/\" target=\"_blank\">Privacy di Fattura24</a>" . "<br />";
?>

That is working.