PhpBrew\Extension\Extension::findConfigM4File PHP Метод

    public function findConfigM4File($dir)
    {
        $configM4Path = $dir . DIRECTORY_SEPARATOR . 'config.m4';
        if (file_exists($configM4Path)) {
            return 'config.m4';
        }
        for ($i = 0; $i < 10; ++$i) {
            $filename = "config{$i}.m4";
            $configM4Path = $dir . DIRECTORY_SEPARATOR . $filename;
            if (file_exists($configM4Path)) {
                return $filename;
            }
        }
    }

 public function findConfigM4File($dir)
 {
     if ($file = parent::findConfigM4File($dir)) {
         return $file;
     }
     if ($file = $this->findConfigM4FileFromPackageXml()) {
         return $file;
     }
 }