getprotobyname

(PHP 4, PHP 5)

getprotobyname — Get protocol number associated with protocol name

说明

int getprotobyname ( string $name )

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

参数

name: The protocol name.

返回值

Returns the protocol number or -1 if the protocol is not found.

范例

Example#1 getprotobyname() example


<?php
$protocol = 'tcp';
$get_prot = getprotobyname($protocol);
if ($get_prot == -1) {
    echo 'Invalid Protocol';
} else {
    echo 'Protocol #' . $get_prot;
}
?>

参见

getprotobynumber()