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.

示例

示例 #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

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Vipindas K.S ¶

17 years ago

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 />";}?>