VersionPress\VersionPress::getVersion PHP Method

    public static function getVersion()
    {
        if (!function_exists('get_plugin_data')) {
            require_once ABSPATH . 'wp-admin/includes/plugin.php';
        }
        $pluginData = get_plugin_data(VERSIONPRESS_PLUGIN_DIR . "/versionpress.php", false, false);
        return $pluginData['Version'];
    }

 public static function getAllInfo()
 {
     $output = [];
     $output['summary'] = [];
     $output['git-info'] = self::getGitInfo();
     $output['wordpress-info'] = self::getWordPressInfo();
     $output['php-info'] = self::getPhpInfo();
     $output['permission-info'] = self::getPermissionInfo();
     $output['summary']['wordpress-version'] = $output['wordpress-info']['wp-version'];
     $output['summary']['versionpress-version'] = VersionPress::getVersion();
     $output['summary']['operating-system'] = php_uname();
     $output['summary']['php-version'] = phpversion();
     $output['summary']['php-sapi'] = php_sapi_name();
     $output['summary']['git-version'] = isset($output['git-info']['git-version']) ? $output['git-info']['git-version'] : '';
     $output['summary']['git-full-path'] = isset($output['git-info']['git-full-path']) ? $output['git-info']['git-full-path'] : '';
     return $output;
 }