PHP Manual: getprotobyname


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getprotobyname

(PHP 4, PHP 5)

getprotobyname -- Get protocol number associated with protocol name

Description

int getprotobyname ( string name )

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

Parameters

name

The protocol name.

Return Values

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

Examples

Example 1. getprotobyname() example

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