用于打印文件和目录的PHP递归功能不起作用

Question

I am trying to make recursive PHP function which will loop through tree of directories and subdirectories and put all directories and files in one array.

My code looks logical to me, but it is not working.

Tree of directories and files:

PHP code

    <?php
        function printFiles($directory) {
            $files = array();

            foreach (scandir($directory) as $file) {
                if ($file === '.' || $file === '..') 
                    continue;

                // checking is it file or directory
                if (is_dir($directory . '\\'. $file)) {
                    return printFiles($directory . '\\'.  $file);
                }

                array_push($files, $file);
            }

            return($files);
        }

        $directory = 'C:\Users\Jakov\Desktop\DIRECTORIES';
        print_r(printFiles($directory));

    ?>

I am getting this result:

Array ( )

Answer 1

You are only getting the files contained in the first deepest folder your function encounters, A_1_1 , which has no files inside.

Don't return when you find a directory. Add to current list instead:

// checking is it file or directory
if (is_dir($directory . '/'. $file)) {
    $files = array_merge($files, printFiles($directory . '/'.  $file));
} else {
    array_push($files, $file);
}

Also, use / for paths. It works in Windows and you will avoid escaping errors:

$directory = 'C:/Users/Jakov/Desktop/DIRECTORIES';

(In your code, you should be using \\\\ instead of \\ as separator.)

You should also check for links -and ignore them-, or you could get trapped in an infinite loop.