Hide Email - PHP

<?php
//PHP encrypts your E-mail address and generates the javascript that decrypts it. Most bots and spiders can't execute javascript and that is what makes this work.
  function hide_email($email) { $character_set = '+-.0123456789@ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz'; $key = str_shuffle($character_set); $cipher_text = ''; $id = 'e'.rand(1,999999999); for ($i=0;$i<strlen($email);$i+=1) $cipher_text.= $key[strpos($character_set,$email[$i])]; $script = 'var a="'.$key.'";var b=a.split("").sort().join("");var c="'.$cipher_text.'";var d="";'; $script.= 'for(var e=0;e<c.length;e++)d+=b.charAt(a.indexOf(c.charAt(e)));'; $script.= 'document.getElementById("'.$id.'").innerHTML="<a href=\"mailto:"+d+"\">"+d+"</a>"'; $script = "eval("".str_replace(array("\",'"'),array("\\",'"'), $script)."")"; $script = '<script type="text/javascript">/*<![CDATA[*/'.$script.'/*]]>*/</script>'; return '<span id="'.$id.'">[javascript protected email address]</span>'.$script; } 
  ?>
 
  //////////// USAGE ////////////
 
  This is the PHP code you write where you want the E-mail address on your web page.
 
  <?php echo hide_email('[email protected]'); ?>
 
  This is what the E-mail address will look like for the visitor of your web page.
 
  <span id="e401621484">[javascript protected email address]</span><script type="text/javascript">/*<![CDATA[*/eval("var a="[email protected]O6";var b=a.split("").sort().join("");var c="p37p8p37pa1GC";var d="";for(var e=0;e<c.length;e++)d+=b.charAt(a.indexOf(c.charAt(e)));document.getElementById("e401621484").innerHTML="<a href=\"mailto:"+d+"\">"+d+"</a>"")/*]]>*/</script>