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Vendor mjaschen
Package astrotools
Short Description General Purpose Astronomy Library for PHP
License MIT
Homepage https://github.com/mjaschen/astrotools

Keywords astronomy

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Example code of mjaschen/astrotools

Informations about the package astrotools

Astrotools

Astrotools is a general purpose PHP library for astronomy.

Requirements

PHP >= 7.3
bcmath extension

Older PHP versions

0.1.x branch supports PHP >= 7.0
0.0.x branch supports PHP 5.4 - 5.6. For details see the next section.

Installation

PHP 7.0, PHP 7.1, PHP 7.2

If you need to use Astrotools with PHP 7.0, 7.1 or 7.2 just require version 0.1:

Please keep in mind, that the 0.1.x branch is no longer maintained and won't get any updates.

PHP 5

If you need to use Astrotools with PHP 5.4, 5.5, or 5.6, just require version 0.0.2:

Please keep in mind, that the 0.0.x branch is no longer maintained and won't get any updates.

Features

Julian day calculation (forward/reverse)
Sidereal time calculation (GMST, local sidereal time)
Date of Easter calculation
Time helper

Why not use PHP's calendar extension?

Some implemented features (e.g. calculation of Julian day or Date of Easter) are already provided by PHP's calendar extension.

These functions come with some problems, e.g. easter_date() can only calculate the Date of Easter for the timerange of unix timestamps (1970 January 1 to somewhere around 2037/2038).