Several methods of PHP folder traversal

This article is mainly to share with you several methods of PHP folder traversal, I hope to help everyone.

Function

function DirTree () {
    if (!is_dir ($path)) return [];        $files = [];        $dir = Opendir ($path);        while ($file = Readdir ($dir)) {            if ($file = = '. ' | | $file = = ' ... ') continue;            $new _path = Trim ($path, '/'). ' /'. Trim ($file, '/');            $files [] = $new _path;            if (Is_dir ($new _path)) {                $files = Array_merge ($files, $this->ergodicdir2 ($new _path));
            }
        }
        Closedir ($dir);        return $files;
}

Directory Class

function DirTree () {
    if (!is_dir ($path)) return [];        $files = [];        $dir _h = dir ($path);        while ($file = $dir _h->read ()) {            if ($file = = '. ' | | $file = = ' ... ') continue;            $new _path = Trim ($path, '/'). ' /'. Trim ($file, '/');            $files [] = $new _path;            if (Is_dir ($new _path)) {                $files = Array_merge ($files, $this->ergodicdir3 ($new _path));
            }
        }        $dir _h->close ();        return $files;
}

Iterators

function DirTree () {
 if (!is_dir ($path))    return [];        $files = [];        $dir = new \directoryiterator ($path); foreach ($dir as $key = + $file) {if ($file->getfilename () = = '. ' | | $file->getfilename () = = ') {continue;            
} $files [] = $file->getpathname ();            if ($file->isdir ()) {$files = Array_merge ($files, $this->ergodicdir5 ($file->getpathname ())); 
 } 
} return $files; 
}