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like and send options for a website
<div id="fb-root"></div>
<script>
  window.fbAsyncInit = function() {
FB.init({
  appId      : 'YOUR_APP_ID', // App ID
  channelUrl : '//WWW.YOUR_DOMAIN.COM/channel.html', // Channel File
  status     : true, // check login status
  cookie     : true, // enable cookies to allow the server to access the session
  xfbml      : true  // parse XFBML
});

// Additional initialization code here
  };

  // Load the SDK Asynchronously
  (function(d){
 var js, id = 'facebook-jssdk'; if (d.getElementById(id)) {return;}
 js = d.createElement('script'); js.id = id; js.async = true;
 js.src = "//connect.facebook.net/en_US/all.js";
 d.getElementsByTagName('head')[0].appendChild(js);
   }(document));
</script>

<?php
    $cache_expire = 60*60*24*365;
    header("Pragma: public");
    header("Cache-Control: max-age=".$cache_expire);
    header('Expires: ' . gmdate('D, d M Y H:i:s', time()+$cache_expire) . ' GMT');
  ?>
  <script src="//connect.facebook.net/en_US/all.js"></script>

<html xmlns:fb="http://ogp.me/ns/fb#">

<fb:like href="WWW.YOUR_DOMAIN.COM" send="true" width="450" show_faces="true"></fb:like>