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(PHP 4, PHP 5)
getprotobynumber — Ermittelt den Protokollnamen anhand der Protokollnummer
Die Funktion getprotobynumber() gibt den Protokollnamen passend zur angegebenen Protokollnummer (number) zurück. Der Wert wird anhand der Datei /etc/protocols ermittelt.
Die Protokollnummer.
Gibt den Protokollnamen als String zurück.
Note that by the time of writing this note (5.3.3), there seems to be only two defined constants for the protocol numbers: SOL_UDP and SOL_TCP.
For all other protocols (like ICMP,... ) you'll have to provide the exact number (EG: 1 for ICMP, ... )
<?php
echo getprotobynumber(SOL_TCP) . "\n"; // prints tcp
echo getprotobynumber(SOL_UDP) . "\n"; // prints udp
var_dump(getprotobyname('tcp') == SOL_TCP); // bool(true)
var_dump(getprotobyname('udp') == SOL_UDP); // bool(true)
?>
On a UNIX system (don't know if this is true for Windows), the php functions getprotobyname and getprotobynumber are just wrapper for their corresponding system calls. These functions returns the protocol name or protocol number based on the definition from IANA. If you are looking for a protocol and you don't know its number, you can find the exact protocol number here: http://www.iana.org/assignments/protocol-numbers
getprotobynumber()
=====================
getprotobynumber() gets the protocol name for the given protocol number on the local system. If the protocol number is not recognized,the function returns FALSE.The given code snippet gives the list of protocols along with their protocol numbers
<?
$format = "%6s %s\n<br />";
for ($number = 0; $number < 255; $number++)
{
if (getprotobynumber ($number))
printf ($format, " $number-->", getprotobynumber ($number));
}
?>
OUTPUT:
0--> ip
1--> icmp
3--> ggp
6--> tcp
8--> egp
12--> pup
17--> udp
20--> hmp
22--> xns-idp
27--> rdp
66--> rvd
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