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protect email - output filter plugin

 
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kuras
Smarty n00b


Joined: 02 Nov 2007
Posts: 1

PostPosted: Fri Nov 02, 2007 11:22 am    Post subject: protect email - output filter plugin Reply with quote

nothing realy new... but I hope it will help someone.

There is one simple email protection filter as an example here:
(see smarty documentation Chapter 16. Extending Smarty With Plugins. Output Filters)

And here is my approach.

Code:
<?php
/*
 * Smarty plugin
 * -------------------------------------------------------------
 * File:     outputfilter.protect_email_hex.php
 * Type:     outputfilter
 * Name:     protect_email_hex
 * Purpose:  Email protection against spambots
 * Date :  2007-11-01
 * Written by: kuras
 * -------------------------------------------------------------
 */
function encode_email($matches)
{
   $address = $matches[1];
   $address_encode = '';
   
   for ($x=0; $x < strlen($address); $x++)
      {
      if(preg_match('!\w!',$address[$x])) {
         $address_encode .= '%' . bin2hex($address[$x]);
         } else {
         $address_encode .= $address[$x];
         }
      }

// REMOVE SPACES in $mailto variables value.
   $mailto = "& #109;& #97;& #105;& #108;& #116;& #111;& #58;";

   $text = $matches[2];
   $text_encode = '';
   
   for ($x=0; $x < strlen($text); $x++) {
      $text_encode .= '&#x' . bin2hex($text[$x]).';';
      }

   return "<a href=".$mailto.$address_encode.">".$text_encode."</a>";
}

function smarty_outputfilter_protect_email_hex($tpl_output, &$tpl)
{
   return preg_replace_callback("/\<a href\=\"mailto:(.*?)\"\>(.*?)\<\/a\>/i", "encode_email", $tpl_output);
}
?>


The exact email encoding idea (function encode_email()) is also not new.
I took it from smarty {mailto} (HEX encoding type).
You can modify it or replace as you want.

And don't forget to remove SPACES from $mailto value before using...
I just can't post normal code in to this forum, because letter codes would be replaced by actual letters... :)

kurasesu

another similar topic:
http://www.phpinsider.com/smarty-forum/viewtopic.php?t=8563
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cfletcher1856
Smarty n00b


Joined: 21 Mar 2007
Posts: 4

PostPosted: Thu Oct 30, 2008 8:23 pm    Post subject: Reply with quote

I took yours as an example and created one using the smarty mailto.

Code:
<?php
function encode_email($matches)
{
   global $smarty;
   require_once $smarty->_get_plugin_filepath('function', 'mailto');
   
   return smarty_function_mailto(array('address' => $matches[1],
                              'encode'  => 'javascript',
                              'text'    => $matches[2]
                              ),
                              $smarty);
}

function smarty_outputfilter_email_encode($tpl_output, &$smarty)
{
   return preg_replace_callback("/\<a href\=\"mailto:(.*?)\"\>(.*?)\<\/a\>/i", "encode_email", $tpl_output);
}
?>
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