Link object same as http://api.drupal.org/api/drupal/core%21includes%21common.inc/function/l/8

gistfile1.php

<?php
$link = new Link();
$link->text = 'foo';
$link->path = 'bar';
$link->attributes = new Attribute();
$link->language = LANGUAGE_NONE;
$link->html = TRUE;
$link->query = array('foo' => 'bar');
$link->fragment => 'foo-bar'; 
$link->absolute' => FALSE; 
$link->alias => FALSE; 
$link->prefix => '';

print $link; //<a href="/bar?foo=bar#foo-bar">foo</a>