getprotobyname

(PHP 4, PHP 5, PHP 7, PHP 8)

getprotobyname — Get protocol number associated with protocol name

说明

getprotobyname ( string $protocol ) : int|false

getprotobyname() returns the protocol number associated with the protocol protocol as per /etc/protocols.

参数

protocol: The protocol name.

返回值

Returns the protocol number, 或者在失败时返回 false.

范例

Example #1 getprotobyname() 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

User Contributed Notes

Vipindas K.S 08-May-2008 08:33


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 />";

}



?>