Online PHP editor | output for pvldm

<?php class Version { const STAGE_ALPHA = 1; const STAGE_BETA = 2; const STAGE_RC = 3; const STAGE_RELEASE = 4; public $major; public $minor; public $release; public $stageName; public $stageNo; private $stageMap = [ 'alpha' => self::STAGE_ALPHA, 'beta' => self::STAGE_BETA, 'rc' => self::STAGE_RC, ]; /** * @param string $version * @throws \Exception */ public function __construct($version) { static $tagNameExpr = '# ^ v? (?P<major>[0-9]+) \. (?P<minor>[0-9]+) (?:\.(?P<release>[0-9]+))? (?:- (?P<stage>alpha|beta|rc) (?:(?P<stageno>\d+))? )? $ #ix'; if (!preg_match($tagNameExpr, trim(strtolower($version)), $match)) { throw new \Exception('Invalid version spec string'); } $this->major = (int)$match['major']; $this->minor = (int)$match['minor']; $this->release = isset($match['release']) ? (int)$match['release'] : null; $this->stageName = isset($match['stage']) ? $match['stage'] : ''; $this->stageNo = isset($match['stageno']) ? (int)$match['stageno'] : null; } /** * @return string */ public function __toString() { return "$this->major.$this->minor." . ($this->release ?: 0) . ($this->stageNo ? '-' . $this->stageName . $this->stageNo : ''); } /** * @param string[] $stages * @return bool */ public function isValidNextStage(array $stages) { $latestStageType = $latestStagePoint = 0; foreach ($stages as $stage) { if ($stage === '') { // a release already exists return false; } if (preg_match('#^(alpha|beta|rc)(\d+)$#', strtolower($stage), $match)) { if ($this->stageMap[$match[1]] > $latestStageType) { $latestStageType = $this->stageMap[$match[1]]; $latestStagePoint = 0; } else if ($this->stageMap[$match[1]] === $latestStageType && $match[2] > $latestStagePoint) { $latestStagePoint = (int)$match[2]; } } } if (!$this->stageName) { // this is a release and one does not yet exist return true; } if (!isset($this->stageMap[$this->stageName])) { // invalid new stage return false; } if ($this->stageMap[$this->stageName] < $latestStageType) { // new stage lower than latest return false; } if ($this->stageMap[$this->stageName] > $latestStageType) { // new stage greater than latest, number must be 1 if (!isset($this->stageNo)) { $this->stageNo = 1; return true; } return $this->stageNo === 1; } if (!isset($this->stageNo)) { $this->stageNo = $latestStagePoint + 1; return true; } return $this->stageNo === $latestStagePoint + 1; } } var_dump(new Version('1.12-beta'));