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 />";
}
?>
getprotobyname
(PHP 4, PHP 5)
getprotobyname — Get protocol number associated with protocol name
說明
int getprotobyname
( string
$name
)
getprotobyname() returns the protocol number
associated with the protocol name as per
/etc/protocols.
參數
-
name -
The protocol name.
回傳值
Returns the protocol number, 或者在失敗時回傳 FALSE.
範例
Example #1 getprotobyname() example
<?php
$protocol = 'tcp';
$get_prot = getprotobyname($protocol);
if ($get_prot === FALSE) {
echo 'Invalid Protocol';
} else {
echo 'Protocol #' . $get_prot;
}
?>
add a note
User Contributed Notes 1 note
Vipindas K.S ¶
16 years ago
