API Documentation

Zend/TimeSync/Ntp.php

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Zend Framework

LICENSE

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Category
Zend  
Copyright
Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)  
License
New BSD License  
Package
Zend_TimeSync  
Version
$Id: Ntp.php 24594 2012-01-05 21:27:01Z matthew $  

\Zend_TimeSync_Ntp

Package: Zend\TimeSync

NTP Protocol handling class

Parent(s)
\Zend_TimeSync_Protocol
Category
Zend  
Copyright
Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)  
License
New BSD License  

Properties

Propertyprotectedinteger  $_port= '123'

NTP port number (123) assigned by the Internet Assigned Numbers Authority

Default value123Details
Type
integer

Methods

methodpublic__construct( string $timeserver, integer $port = 123 ) : void

NTP 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

methodprotected_extract( string|array $binary ) : integer

Extracts the binary data returned from the timeserver

Parameters
Name Type Description
$binary string|array

Data returned from the timeserver

Returns
Type Description
integer Difference in seconds
methodprotected_getFloat( string $input ) : float

Calculates a 32bit signed fixed point number

Parameters
Name Type Description
$input string
Returns
Type Description
float
methodprotected_getInteger( string $input ) : integer

Calculates a 32bit integer

Parameters
Name Type Description
$input string
Returns
Type Description
integer
methodprotected_getTimestamp( string $input ) : float

Calculates a 64bit timestamp

Parameters
Name Type Description
$input string
Returns
Type Description
float
methodprotected_prepare( ) : string

Prepare 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
methodprotected_read( ) : array

Reads the data returned from the timeserver

This will return an array with binary data listing:

Returns
Type Description
array
Throws
Exception Description
\Zend_TimeSync_Exception When timeserver can not be connected
methodprotected_write( string $data ) : void

Sends the NTP packet to the server

Parameters
Name Type Description
$data string

Data to send to the timeserver

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