Bolt\Version::compare PHP Méthode

    public static function compare($version, $operator)
    {
        $currentVersion = str_replace(' ', '', strtolower(static::VERSION));
        $version = str_replace(' ', '', strtolower($version));
        return version_compare($version, $currentVersion, $operator);
    }

 /**
  * Attempt to load cached configuration files.
  *
  * @throws LowlevelException
  *
  * @return bool
  */
 protected function loadCache()
 {
     $dir = $this->app['resources']->getPath('config');
     /* Get the timestamps for the config files. `config_local.yml` and `extensions.yml` default to '0', because if
           they aren't present, it shouldn't trigger an update for the cache, while the others should.
        */
     $timestamps = [file_exists($dir . '/config.yml') ? filemtime($dir . '/config.yml') : 10000000000, file_exists($dir . '/taxonomy.yml') ? filemtime($dir . '/taxonomy.yml') : 10000000000, file_exists($dir . '/contenttypes.yml') ? filemtime($dir . '/contenttypes.yml') : 10000000000, file_exists($dir . '/menu.yml') ? filemtime($dir . '/menu.yml') : 10000000000, file_exists($dir . '/routing.yml') ? filemtime($dir . '/routing.yml') : 10000000000, file_exists($dir . '/permissions.yml') ? filemtime($dir . '/permissions.yml') : 10000000000, file_exists($dir . '/extensions.yml') ? filemtime($dir . '/extensions.yml') : 0, file_exists($dir . '/config_local.yml') ? filemtime($dir . '/config_local.yml') : 0];
     $configCache = $this->app['resources']->getPath('cache/config-cache.json');
     $this->cachetimestamp = file_exists($configCache) ? filemtime($configCache) : 0;
     if ($this->cachetimestamp > max($timestamps)) {
         $finder = new Finder();
         $finder->files()->in($this->app['resources']->getPath('cache'))->name('config-cache.json')->depth('== 0');
         /** @var SplFileInfo $file */
         foreach ($finder as $file) {
             try {
                 $this->data = json_decode($file->getContents(), true);
             } catch (\RuntimeException $e) {
                 $part = Translator::__('Try logging in with your ftp-client and make the file readable. ' . 'Else try to go <a>back</a> to the last page.');
                 $message = '<p>' . Translator::__('general.phrase.file-not-readable-following-colon') . '</p>' . '<pre>' . htmlspecialchars($configCache) . '</pre>' . '<p>' . str_replace('<a>', '<a href="javascript:history.go(-1)">', $part) . '</p>';
                 throw new LowlevelException(Translator::__('page.file-management.message.file-not-readable' . $message));
             }
         }
         // Check if we loaded actual data.
         if (count($this->data) < 4 || empty($this->data['general'])) {
             return false;
         }
         // Check to make sure the version is still the same. If not, effectively invalidate the
         // cached config to force a reload.
         if (!isset($this->data['version']) || Bolt\Version::compare($this->data['version'], '!=')) {
             // The logger and the flashbags aren't available yet, so we set a flag to notify the user later.
             $this->notify_update = true;
             return false;
         }
         // Trigger the config loaded event on the resource manager
         $this->app['resources']->initializeConfig($this->data);
         // Yup, all seems to be right.
         return true;
     }
     return false;
 }