Drupal - How can you make an HTML link?
The HTML attribute removal was documented in change record #2932803, but the example uses the now deprecated SafeMarkup::format function. The FormattableMarkup class allows a non-deprecated way to do this. The API page has some good examples such as below:
Remember that this is has security implications, and to only use FormattableMarkup when you absolutely need it with strict placeholders.
$value = FormattableMarkup::placeholderFormat('<a href=":url">@variable</a>', [':url' => $url, @variable => $variable]);
There's probably a better way to do this without printing the anchor element and href attribute yourself.
That's what worked for me. https://stackoverflow.com/a/44163527/1151303
<?php
use Drupal\Core\Render\Markup;
use Drupal\Core\Url;
$form['actions']['reset_password'] = [
'#type' => 'link',
'#title' => Markup::create(
'<span class="glyphicon glyphicon-cog"></span> Forgot / Reset Password'
), '#url' => Url::fromRoute('user.pass'),
];