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() - Get protocol name associated with protocol number