1composer/semver
  2===============
  3
  4Semver library that offers utilities, version constraint parsing and validation.
  5
  6Originally written as part of [composer/composer](https://github.com/composer/composer),
  7now extracted and made available as a stand-alone library.
  8
  9[![Build Status](https://travis-ci.org/composer/semver.svg?branch=master)](https://travis-ci.org/composer/semver)
 10
 11
 12Installation
 13------------
 14
 15Install the latest version with:
 16
 17```bash
 18$ composer require composer/semver
 19```
 20
 21
 22Requirements
 23------------
 24
 25* PHP 5.3.2 is required but using the latest version of PHP is highly recommended.
 26
 27
 28Version Comparison
 29------------------
 30
 31For details on how versions are compared, refer to the [Versions](https://getcomposer.org/doc/articles/versions.md)
 32article in the documentation section of the [getcomposer.org](https://getcomposer.org) website.
 33
 34
 35Basic usage
 36-----------
 37
 38### Comparator
 39
 40The `Composer\Semver\Comparator` class provides the following methods for comparing versions:
 41
 42* greaterThan($v1, $v2)
 43* greaterThanOrEqualTo($v1, $v2)
 44* lessThan($v1, $v2)
 45* lessThanOrEqualTo($v1, $v2)
 46* equalTo($v1, $v2)
 47* notEqualTo($v1, $v2)
 48
 49Each function takes two version strings as arguments. For example:
 50
 51```php
 52use Composer\Semver\Comparator;
 53
 54Comparator::greaterThan('1.25.0', '1.24.0'); // 1.25.0 > 1.24.0
 55```
 56
 57### Semver
 58
 59The `Composer\Semver\Semver` class provides the following methods:
 60
 61* satisfies($version, $constraints)
 62* satisfiedBy(array $versions, $constraint)
 63* sort($versions)
 64* rsort($versions)
 65
 66
 67License
 68-------
 69
 70composer/semver is licensed under the MIT License, see the LICENSE file for details.
 71