icingaweb2/library/Icinga/Application/Version.php

<?php
/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */

namespace Icinga\Application;

class Version
{
    /**
     * Get the version of this instance of Icinga Web 2
     *
     * @return array|bool   array on success, false otherwise
     */
    public static function get()
    {
        if (false === ($appVersion = @file_get_contents(
            Icinga::app()->getApplicationDir() . DIRECTORY_SEPARATOR . 'VERSION'
        ))) {
            return false;
        }

        $matches = array();
        if (false === ($res = preg_match(
            '/(?<!.)\s*(?P<gitCommitID>\w+)(?:\s*\(.*?(?:(?<=[\(,])\s*tag\s*:\s*v(?P<appVersion>.+?)\s*(?=[\),]).*?)?\))?\s*(?P<gitCommitDate>\S+)/ms',
            $appVersion,
            $matches
        )) || $res === 0) {
            return false;
        }

        foreach ($matches as $key => $value) {
            if (is_int($key) || $value === '') {
                unset($matches[$key]);
            }
        }
        return $matches;
    }
}