Answer 1

Answer 2

Answer 3

对salathe的改进，就是忘记自定义抽象类。 只需在PHP中使用好的OOP并直接扩展RecursiveRegexIterator：

这是文件过滤器

class FilenameFilter 
extends RecursiveRegexIterator 
{
    // Filter files against the regex
    public function accept() 
    {
        return ! $this->isFile() || parent::accept();
    }
}

目录过滤器

class DirnameFilter 
extends RecursiveRegexIterator 
{
    // Filter directories against the regex
    public function accept() {
        return ! $this->isDir() || parent::accept();
    }
}