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 />";
}
?>