<?php
/*
	Count Number of LinkedIn Shares With WordPress Shortcode
	http://www.beliefmedia.com/linkedin-shares
*/


function beliefmedia_linkedin_shares($atts) {

  $atts = shortcode_atts(array(
    'url' => '',
    'n' => 1,
    'cache' => 3600 * 12
  ), $atts);

 global $post;
 if ($atts['url'] == '') $atts['url'] = get_permalink($post->ID);

 $transient = 'bmlk_' . md5(serialize($atts));
 $cachedresult =  get_transient($transient);

 if ($cachedresult !== false ) {
  return $cachedresult;

  } else {

   /* Get LinkedIn Data */
   $json = file_get_contents('http://www.linkedin.com/countserv/count/share?url=' . $atts['url'] . '&format=json');
   if ($json !== false) $data = json_decode($json, true);
   $return = (!empty($data)) ? intval($data['count']) : 'Unavailable';

   /* Number format */
   if ($n) $return = number_format($return);

  set_transient($transient, $return, $atts['cache']);
  return $return;
 }
}
add_shortcode('linkedinshares', 'beliefmedia_linkedin_shares');