PHP/Date/getservbyport

getservbyport.php

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

Using getservbyport()

 
<?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";
    }
?>