PHP编码电子邮件地址，防止被垃圾邮件程序收集

function encode_email($email='info@domain.com', $linkText='Contact Us', $attrs ='class="emailencoder"' )  
{  
    // remplazar aroba y puntos  
    $email = str_replace('@', '@', $email);  
    $email = str_replace('.', '.', $email);  
    $email = str_split($email, 5);    
  
    $linkText = str_replace('@', '@', $linkText);  
    $linkText = str_replace('.', '.', $linkText);  
    $linkText = str_split($linkText, 5);    
  
    $part1 = '<a href="ma';%20%20%0A%20%20%20%20%24part2%20=%20'ilto:';%20%20%0A%20%20%20%20%24part3%20=%20'" .>';  
    $part4 = '</a>';    
  
    $encoded = '<script type="text/javascript">&#39;;  
    $encoded .= "document.write(&#39;$part1&#39;);";  
    $encoded .= "document.write(&#39;$part2&#39;);";  
    foreach($email as $e)  
    {  
         $encoded .= "document.write(&#39;$e&#39;);";  
    }  
    $encoded .= "document.write(&#39;$part3&#39;);";  
    foreach($linkText as $l)  
    {  
         $encoded .= "document.write(&#39;$l&#39;);";  
    }  
    $encoded .= "document.write(&#39;$part4&#39;);";  
    $encoded .= &#39;</script>';    
  
    return $encoded;  
}