$ip =  $_POST['ipAddress'];
$exc =shell_exec("curl -L https://dynupdate.no-ip.com/dns?username=testtt@yahoo.com&password=sfddeaeZZ.&hostname=example.sytes.net&ip=$ip&#8221");

curl -L https://dynupdate.no-ip.com/dns?username=testtt@yahoo.com&password=sfddeaeZZ.&hostname=example.sytes.net&ip=$ip&#8221"