<?php

$iterator = new RecursiveDirectoryIterator('extra/');

foreach(new RecursiveIteratorIterator($iterator, RecursiveIteratorIterator::CHILD_FIRST) as $file)
{
    if(false == $file->isDir())
    {
        $ficheros[]=$file->getpath()."/".$file->getFilename();
    }
    else 
    {
        $dirs[]=$file->getpath();
    }
}
    
$dirs=array_unique($dirs);

foreach($ficheros as $$file)
    unlink($file);

foreach($dirs as $$file)
    	rmdir($file);

    
?>