PHP/Date/getservbyport

getservbyport.php

   <source lang="html4strict">

<?php

  echo "Port 80"s default service is: ".getservbyport(80, "tcp"); 

?>

 </source>
   
  

Using getservbyport()

   <source lang="html4strict">

<?php

   $port = 80;
   $service = getservbyport($port, "tcp");
   if($service === false) {
       die("Could not find a service running on $port\n");
   } else {
       echo "The "$service" service runs on port $port\n";
   }

?>

 </source>