A facebook share button that supports custom GA event tracking.

GA-friendly-facebook-share-button.php

<!-- https://developers.facebook.com/docs/sharing/reference/share-dialog -->

<div id="shareButton" data-href="<?php echo $bar_fb_url_conf; ?>" style="outline:1px solid red; width: 86px; height:20px; position: relative;"></div>

<script>
$('#shareButton').click(function() {
    FB.ui({
      method: 'share',
      href: $(this).data('href'),
    }, function(response){
      if (response === null) {
        console.log('was not shared');
      } else {
        console.log('shared - post id is ' + response.post_id);
      }
    });
  });
 </script>