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

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