PHP/Network/getprotobyname

Using getprotobyname()

   <source lang="html4strict">

<?php

   $proto = "smp";
   $proto_num = getprotobyname($proto);
   if($proto_num == -1) {
       die("Could not find protocol "$proto"\n");
   } else {
       echo "The "$proto" protocol has an ID of $proto_num\n";
   }

?>

 </source>