method of hiding email addresses from harvesters

email_obfuscation.php

<?php
function utf_char_to_number($char)
{
    $i = 0;
    $number = '';
    while (isset($char{$i}))
    {
        $number .= '&#'.ord($char{$i}).';';
        $i++;
    }
    return $number;
}

function utf_char_to_hex($char)
{
    $i = 0;
    $number = '';
    while (isset($char{$i}))
    {
        $number .= '%'.bin2hex($char{$i});
        $i++;
    }
    return $number;
}

$email_post = utf_char_to_hex($email);
$link_post = (empty($link)) ? utf_char_to_number($email) : utf_char_to_number($link);

echo 'Normal Style:<br />'.PHP_EOL.htmlentities('<a href="mailto:'.$email_post.'">'.$link_post.'</a>');
echo '<br /><br />';
echo 'Javascript Method:<br />'.PHP_EOL.htmlentities('<script language="JavaScript">document.write(\'<a hre\'+\'f="ma\'+\'ilto\'+\':\'+\''.$email_post.'">'.$link_post.'</a>\');</script>');
echo '<br /><br />';
echo 'Wiki Style:<br />'.PHP_EOL.htmlentities('[mailto:'.$email_post.' '.$link_post.']');
?>