PHP Echo ipv4 and Ipv6

Question

How Do I make it so my script echo's both IPv4 And IPv6, but if 1 of them is not detected it will say ''Not Detected''.

<?php
echo 'IPv4 '.$_SERVER['REMOTE_ADDR'];  
?>

Answer 1

There's only one address, IPv4 or IPv6. You can detect using the filter extension

$ip = $_SERVER['REMOTE_ADDR'];
if(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
       echo "IPv6 detected";
 }
else {
      echo "IPv4";
}