TimeSync/Ntp.php
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LICENSE
This source file is subject to the new BSD license that is bundled
with this package in the file LICENSE.txt.
It is also available through the world-wide-web at this URL:
http://framework.zend.com/license/new-bsd
If you did not receive a copy of the license and are unable to
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to license@zend.com so we can send you a copy immediately.
- Category
- Zend
- Copyright
- Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
- License
- New BSD License
- Package
- Zend_TimeSync
- Version
- $Id$
\Zend_TimeSync_Ntp
Package: Zend_TimeSync
Throws
NTP Protocol handling class
- Parent(s)
- \Zend_TimeSync_Protocol
- Category
- Zend
- Copyright
- Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
- License
- New BSD License
Properties
integer $_port = 123NTP port number (123) assigned by the Internet Assigned Numbers Authority
Default value
123Details- Type
- integer
Methods
__construct(string $timeserver, integer $port = 123) : voidNTP class constructor, sets the timeserver and port number
Parameters
| Name | Type | Description |
|---|---|---|
| $timeserver | string | Adress of the timeserver to connect to |
| $port | integer | (Optional) Port for this timeserver |
_extract(string | array $binary) : integerExtracts the binary data returned from the timeserver
Parameters
Returns
| Name | Type | Description |
|---|---|---|
| $binary | string | array | Data returned from the timeserver |
| Type | Description |
|---|---|
| integer | Difference in seconds |
_getFloat(string $input) : floatCalculates a 32bit signed fixed point number
Parameters
Returns
| Name | Type | Description |
|---|---|---|
| $input | string |
| Type | Description |
|---|---|
| float |
_getInteger(string $input) : integerCalculates a 32bit integer
Parameters
Returns
| Name | Type | Description |
|---|---|---|
| $input | string |
| Type | Description |
|---|---|
| integer |
_getTimestamp(string $input) : floatCalculates a 64bit timestamp
Parameters
Returns
| Name | Type | Description |
|---|---|---|
| $input | string |
| Type | Description |
|---|---|
| float |
_prepare() : stringPrepare local timestamp for transmission in our request packet
NTP timestamps are represented as a 64-bit fixed-point number, in
seconds relative to 0000 UT on 1 January 1900. The integer part is
in the first 32 bits and the fraction part in the last 32 bits
Returns| Type | Description |
|---|---|
| string |
_read() : arrayReads the data returned from the timeserver
This will return an array with binary data listing:
Returns| Type | Description |
|---|---|
| array |
| Exception | Description |
|---|---|
| \Zend_TimeSync_Exception | When timeserver can not be connected |
_write(string $data) : voidSends the NTP packet to the server
Parameters
| Name | Type | Description |
|---|---|---|
| $data | string | Data to send to the timeserver |