function cProtect($text)
{
    //protect the contact info by reversing phone number and email, and then re-reverse it again via css
    $phone = get_phone($text);
    $email = get_email($text);
    $revphone = str_mirror($phone);
    $revemail = str_mirror($email);
   
    $text = str_replace($phone, $revphone, $text);
    $text = str_replace($email, $revemail, $text);
    return $text;
}

function str_mirror($string)
{
    $res = strrev($string);
    $res = ''.$res.'';
    return $res;
}

function get_phone($string)
{
    $regex = '/\(?([0-9]{2,4})\)?[-. ]?([0-9]{2,4})[-. ]?([0-9]{2,4})[-. ]?(([0-9]{2,4}))?[-. ]?([0-9]{2,4})?[-. ]?/is';
    preg_match($regex, $string, $match);
    if(isset($match[0]))
    {
        return $match[0];
    }
    return false;
}

function get_email($string)
{
    $regex = "/([_a-z0-9-]+)(\.[_a-z0-9-]+)*@([a-z0-9-]+)(\.[a-z0-9-]+)*(\.[a-z]{2,4})/is";
    preg_match($regex, $string, $match);
    if(isset($match[0]))
    {
        return $match[0];
    }
    return false;
}

$text = "please call at 123 456 789, or email me at test@example.com";

echo cProtect($text);

please call at 987 654 321, or email me at moc.elpmaxe@tset