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Version
Library for handling version information and constraints
Installation
You can add this library as a local, per-project dependency to your project using Composer:
composer require phar-io/version
If you only need this library during development, for instance to run your project's test suite, then you should add it as a development-time dependency:
composer require --dev phar-io/version
Version constraints
A Version constraint describes a range of versions or a discrete version number. The format of version numbers follows the schema of semantic versioning: <major>.<minor>.<patch>. A constraint might contain an operator that describes the range.
Beside the typical mathematical operators like <=, >=, there are two special operators:
Caret operator: ^1.0
can be written as >=1.0.0 <2.0.0 and read as »every Version within major version 1«.
Tilde operator: ~1.0.0
can be written as >=1.0.0 <1.1.0 and read as »every version within minor version 1.1. The behavior of tilde operator depends on whether a patch level version is provided or not. If no patch level is provided, tilde operator behaves like the caret operator: ~1.0 is identical to ^1.0.
Usage examples
Parsing version constraints and check discrete versions for compliance:
use PharIo\Version\Version;
use PharIo\Version\VersionConstraintParser;
$parser = new VersionConstraintParser();
$caret_constraint = $parser->parse( '^7.0' );
$caret_constraint->complies( new Version( '7.0.17' ) ); // true
$caret_constraint->complies( new Version( '7.1.0' ) ); // true
$caret_constraint->complies( new Version( '6.4.34' ) ); // false
$tilde_constraint = $parser->parse( '~1.1.0' );
$tilde_constraint->complies( new Version( '1.1.4' ) ); // true
$tilde_constraint->complies( new Version( '1.2.0' ) ); // false
As of version 2.0.0, pre-release labels are supported and taken into account when comparing versions:
$leftVersion = new PharIo\Version\Version('3.0.0-alpha.1');
$rightVersion = new PharIo\Version\Version('3.0.0-alpha.2');
$leftVersion->isGreaterThan($rightVersion); // false
$rightVersion->isGreaterThan($leftVersion); // true
