WP: encodes email address by converting each character into HTML entities to help protect against spambots

encode_email.php

<?php 
// WordPress function that encodes an email address (and adds mailto: link)
echo antispambot('protectmy@email.com', 1);
?>


<?php
// Shortcode to encode email address in a mailto: link
function protect_email_address( $atts , $content=null ) {
    for ($i = 0; $i < strlen($content); $i++) $encodedmail .= "&#" . ord($content[$i]) . ';';
    return '<a href="mailto:'.$encodedmail.'">'.$encodedmail.'</a>';
}
add_shortcode('mailto', 'protect_email_address');

/*
  Then use this shortcode format to 'encode' it:
    [mailto]protectmy@email.com[/mailto]
*/
?>