Question

How to use getprotobynumber() function to get protocol name from a number in PHP

Answer 1

for ($number = 0; $number < 255; $number++)
{
    $protocol = getprotobynumber($number);
    if ($protocol)
        echo $number . " - " . $protocol . "<br />";
}

   
/*
run: 

0 - ip
1 - icmp
3 - ggp
6 - tcp
8 - egp
12 - pup
17 - udp
20 - hmp
22 - xns-idp
27 - rdp
41 - ipv6
43 - ipv6-route
44 - ipv6-frag
50 - esp
51 - ah
58 - ipv6-icmp
59 - ipv6-nonxt
60 - ipv6-opts
66 - rvd

*/

 

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