<?php
$link_share = "http://yourdomain.com/uri_here";
$twitter_param = array(
  "text" => urlencode("title here"),
  "url" => $link_share //note url as last to prevent ? from failing in url
);

$linkedin_param = array(
  "url" => $link_share
);

$fb_param = array(
  "t" => urldecode("title here"),
  "u" => $link_share
);
?>
<div class="social">
        <a href="https://twitter.com/share?<?=http_build_query($twitter_param)?>" class="twitter" target="_blank">

        </a>

        <a href="http://www.facebook.com/sharer.php?<?=http_build_query($fb_param)?>" onClick="" class="fb" target="_blank">

        </a>

        <a href="https://www.linkedin.com/cws/share?<?=http_build_query($linkedin_param)?>" class="linkedin" target="_blank">

        </a>
      </div>