How to print user profile picture

Hi

I have use following code. but still not work.

<?php if ($profile['picture-url']) : ?>
    <a href="<?php print $profile['public-profile-url']['value']; ?>" <?php if ($profile['first-name']['value'] || $profile['last-name']['value']) : ?> title="Public profile of <?php print $profile['first-name']['value'] . ' ' . $profile['last-name']['value']; ?> on www.linkedin.com."<?php endif; ?> >
        <img src="<?php print $profile['picture-url']['value']; ?>" alt="<?php print $profile['first-name']['value'] . ' ' . $profile['last-name']['value']; ?>" />
      </a>
  <?php endif; ?>