Как получить IPv4

$_SERVER["REMOTE_ADDR"]

inet_ntop

function ipV($ip) {
     return strpos($ip, ":") === false ? 4 : 6;
}

// Grab the IP address of the user
$ipaddress = getenv("REMOTE_ADDR") ; echo 'IP Address: '.$ipaddress;
 
// Check if we need to try and get the IPv4 address
if(filter_var($ipaddress, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
?>
<script src=
"https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js">
    </script>
 
      <script>
 
    /* Add "https://api.ipify.org?format=json" statement
               this will communicate with the ipify servers in
               order to retrieve the IP address $.getJSON will
               load JSON-encoded data from the server using a
               GET HTTP request */
 
    $.getJSON("https://api.ipify.org?format=json", function(data) {
 
        // Setting text of element P with id gfg
        $("#gfg").html(data.ip);
    })
    </script>
 
       <p id="gfg"></p>
<?
}
else {
}

$ipv4 = hexdec(substr($ipv6, 0, 2)). "." . hexdec(substr($ipv6, 2, 2)). "." . hexdec(substr($ipv6, 5, 2)). "." . hexdec(substr($ipv6, 7, 2));

file_get_contents('https://ipinfo.io/');

file_get_contents('http://ip-api.com/json/'.$IPv6);