getprotobyname()
(PHP 4, PHP 5, PHP 7)
Get protocol number associated with protocol name
说明
getprotobyname(string $name): int
getprotobyname()returns the protocol number associated with the protocol$nameas per/etc/protocols.
参数
- $name
The protocol name.
返回值
Returns the protocol number,或者在失败时返回FALSE
.
范例
Example #1getprotobyname()example
<?php $protocol = 'tcp'; $get_prot = getprotobyname($protocol); if ($get_prot === FALSE) { echo 'Invalid Protocol'; } else { echo 'Protocol #' . $get_prot; } ?>
参见
getprotobynumber()
Get protocol name associated with protocol number
getprotobyname() ===================== getprotobyname() gives the protocol number for the given protocol name on the local system. If the protocol is not recognized, then the function returns -1. The given code snippet gives the list of protocols along with their protocol numbers <? $arr=array("ip","icmp","ggp","tcp", "egp","pup","udp","hmp","xns-idp", "rdp","rvd" ); //Reads the names of protocols into an array.. for($i=0;$i<11;$i++) { $proname=$arr[$i]; echo $proname .":", getprotobyname ($proname)."<br />"; } ?>