Symfony\Component\DependencyInjection\Dumper\PhpDumper::export PHP Method

    private function export($value)
    {
        if (null !== $this->targetDirRegex && is_string($value) && preg_match($this->targetDirRegex, $value, $matches, PREG_OFFSET_CAPTURE)) {
            $prefix = $matches[0][1] ? $this->doExport(substr($value, 0, $matches[0][1])).'.' : '';
            $suffix = $matches[0][1] + strlen($matches[0][0]);
            $suffix = isset($value[$suffix]) ? '.'.$this->doExport(substr($value, $suffix)) : '';
            $dirname = '__DIR__';

            if (0 < $offset = 1 + $this->targetDirMaxMatches - count($matches)) {
                $dirname = sprintf('$this->targetDirs[%d]', $offset);
            }

            if ($prefix || $suffix) {
                return sprintf('(%s%s%s)', $prefix, $dirname, $suffix);
            }

            return $dirname;
        }

        return $this->doExport($value);
    }