PHP -读取文件夹，所有的子文件夹，和子文件夹中的文件

我认为你的问题来自这里:

while (false !== ($file = readdir($handle))) // it reads again the same directory as it did in the first while loop

试着用

if ($sub_handle = opendir($dir . $folder)) {
    while (false !== ($file = readdir($sub_handle))) {
        ...
    }
    closedir($sub_handle);
}

此外，在您的情况下，我会使用php glob()函数

查看您的案例的工作示例:

$dir = './inspections/';
if ($handle = opendir($dir)) {
    $blacklist = array('.', '..', 'default', 'default.php', 'desc.txt');
    while (false !== ($folder = readdir($handle))) {
        if (!in_array($folder, $blacklist)) {
            foreach (glob($dir . $folder . "/*.png") as $filename) {
                echo "$filename was found !";
                echo "'r'n";
            }
        }
    }
    closedir($handle);
}

输出:

./inspections/location_4/img_1.png was found !
./inspections/location_4/img_2.png was found !
./inspections/location_4/img_3.png was found !
./inspections/location_4/img_4.png was found !
./inspections/location_4/img_5.png was found !
./inspections/location_4/img_6.png was found !
./inspections/location_3/img_1.png was found !
./inspections/location_3/img_2.png was found !
./inspections/location_3/img_3.png was found !
./inspections/location_3/img_4.png was found !
./inspections/location_3/img_5.png was found !
./inspections/location_3/img_6.png was found !
./inspections/location_2/img_1.png was found !
./inspections/location_2/img_2.png was found !
./inspections/location_2/img_3.png was found !
./inspections/location_2/img_4.png was found !
./inspections/location_2/img_5.png was found !
./inspections/location_2/img_6.png was found !
./inspections/location_1/img_1.png was found !
./inspections/location_1/img_2.png was found !
./inspections/location_1/img_3.png was found !
./inspections/location_1/img_4.png was found !
./inspections/location_1/img_5.png was found !
./inspections/location_1/img_6.png was found !

编辑

要在/checks/location1/thumbs/目录中循环，可以这样做:

foreach (glob($dir . $folder . "/thumbs/*.png") as $filename) {
    echo "$filename was found !";
    echo "'r'n";
}

改订

要使用glob()函数对多个文件夹进行全局化，您的代码应该如下所示:

foreach (glob($dir.$folder."{/thumbs/*.png,/*.png}", GLOB_BRACE) as $filename) {
    echo "$filename was found !";
    echo "'r'n";
}

也许下面的函数有帮助。也有一些评论。它递归地扫描目录(在本例中，从每个目录/子目录中提取图像文件)。

<?php
    $rootPath   = './inspections/';
    $regex      = "#('.png$)|('.jpg$)|('.jpeg$)|('.tiff$)|('.gif$)#";

    /**
     * @param string $directory    => DIRECTORY TO SCAN
     * @param string $regex        => REGULAR EXPRESSION TO BE USED IN MATCHING FILE-NAMES
     * @param string $get          => WHAT DO YOU WANT TO GET? 'dir'= DIRECTORIES, 'file'= FILES, 'both'=BOTH FILES+DIRECTORIES
     * @param bool   $useFullPath  => DO YOU WISH TO RETURN THE FULL PATH TO THE FOLDERS/FILES OR JUST THEIR BASE-NAMES?
     * @param array  $dirs         => LEAVE AS IS: USED DURING RECURSIVE TRIPS
     * @return array
     */
    function scanDirRecursive($directory, $regex=null, $get="file", $useFullPath=false,  &$dirs=[], &$files=[]) {
        $iterator               = new DirectoryIterator ($directory);
        foreach($iterator as $info) {
            $fileDirName        = $info->getFilename();
            if ($info->isFile () && !preg_match("#^'..*?#", $fileDirName)) {
                if($get == 'file' || $get == 'both'){
                    if($regex) {
                        if(preg_match($regex, $fileDirName)) {
                            if ($useFullPath) {
                                $files[] = $directory . DIRECTORY_SEPARATOR . $fileDirName;
                            }
                            else {
                                $files[] = $fileDirName;
                            }
                        }
                    }else{
                        if($useFullPath){
                            $files[]   = $directory . DIRECTORY_SEPARATOR . $fileDirName;
                        }else{
                            $files[]   = $fileDirName;
                        }
                    }
                }
            }else if ($info->isDir()  && !$info->isDot()) {
                $fullPathName   = $directory . DIRECTORY_SEPARATOR . $fileDirName;
                if($get == 'dir' || $get == 'both') {
                    $dirs[]     = ($useFullPath) ? $fullPathName : $fileDirName;
                }
                scanDirRecursive($fullPathName, $regex, $get, $useFullPath, $dirs, $files);
            }
        }
        if($get == 'dir') {
            return $dirs;
        }else if($get == 'file'){
            return $files;
        }
        return ['dirs' => $dirs, 'files' => $files];
    }
    $images    = scanDirRecursive($rootPath, $regex, 'file', true);
    var_dump($images);