note 99887 added to function.getprotobynumber

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 ---- Server IP: 217.71.118.166 Probable Submitter: 91.183.8.79 ---- Manual Page -- http://www.php.net/manual/en/function.getprotobynumber.php Edit -- https://master.php.net/note/edit/99887 Del: integrated -- https://master.php.net/note/delete/99887/integrated Del: useless -- https://master.php.net/note/delete/99887/useless Del: bad code -- https://master.php.net/note/delete/99887/bad+code Del: spam -- https://master.php.net/note/delete/99887/spam Del: non-english -- https://master.php.net/note/delete/99887/non-english Del: in docs -- https://master.php.net/note/delete/99887/in+docs Del: other reasons-- https://master.php.net/note/delete/99887 Reject -- https://master.php.net/note/reject/99887 Search -- https://master.php.net/manage/user-notes.php