获取指定路径的子目录到指定数量的子目录的列表

Question

我正在使用此代码来获取子目录的列表。

<?php 
$path = '/www/sites/'; 

$directory_iterator = new RecursiveDirectoryIterator($path, RecursiveDirectoryIterator::KEY_AS_PATHNAME); 

$iterator = new RecursiveIteratorIterator($directory_iterator, 
    RecursiveIteratorIterator::SELF_FIRST, 
    RecursiveIteratorIterator::CATCH_GET_CHILD); 

foreach ($iterator as $file => $info) { 
    if ($info->isDir()) { 
     echo $file . "\n"; 
    } 
} 
?> 

但它返回我这样

/www/sites/000/4e7 
/www/sites/000/4e7/. 
/www/sites/000/4e7/.. 
/www/sites/000/4e7/mydomains.com 
/www/sites/000/4e7/mydomains.com/. 
/www/sites/000/4e7/mydomains.com/.. 
/www/sites/000/4e7/mydomains.com/web 
/www/sites/000/4e7/mydomains.com/web/. 
/www/sites/000/4e7/mydomains.com/web/.. 
/www/sites/000/4e7/mydomains.com/web/cgi-bin 
/www/sites/000/4e7/mydomains.com/web/cgi-bin/. 
/www/sites/000/4e7/mydomains.com/web/cgi-bin/.. 
/www/sites/000/4e7/mydomains.com/web/Resources 
/www/sites/000/4e7/mydomains.com/web/Resources/. 

东西，我指定的根路径为/www/sites 我只需要在上面的输出

/www/sites/000/4e7/mydomains.com 

其余的都是对我没用。这意味着我只想从指定的路径上爬取3个子目录。我有成千上万的子目录，这就是为什么我想修改当前代码，因为它需要太多时间 先谢谢您。

Answer 1

directoryiterator::isdot()使用，recursiveiteratoriterator::getdepth()，例如：

<?php 
$path = '/www/sites/'; 

$directory_iterator = new RecursiveDirectoryIterator($path,RecursiveDirectoryIterator::KEY_AS_PATHNAME); 

$iterator = new RecursiveIteratorIterator($directory_iterator,RecursiveIteratorIterator::SELF_FIRST,RecursiveIteratorIterator::CATCH_GET_CHILD); 

foreach ($iterator as $file => $info) { 
    // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 
    // Restrict to 3 levels only and ignore non-directory and dot files 
    if ($info->getDepth() >= 3 || !$info->isDir() || $info->isDot()) 
     continue; 
    // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 

    echo $file . "\n"; 
} 

输出

/www/sites/000 
/www/sites/000/4e7 
/www/sites/000/4e7/mydomains.com