Get protocol number associated with protocol name

# getprotobyname

(PHP 4, PHP 5, PHP 7, PHP 8)

getprotobyname — Get protocol number associated with protocol name

### Description

getprotobyname(string `$protocol`): int|false

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

### Parameters

`protocol`

  The protocol name.

### Return Values

Returns the protocol number, or `false` on failure.

### Examples

Example #1 getprotobyname() example

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

### See Also

- getprotobynumber() - Get protocol name associated with protocol number

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