php write subdirectories' contents into separate text files - php

Question

I am trying to list files in subdirectories and write these lists into separate text files.
I managed to get the directory and subdirectory listings and even to write all the files into a text file.
I just don't seem to manage to burst out of loops I am creating. I either end up with a single text file or the second+ files include all preceeding subdirectories content as well.
What I need to achieve is:
dir A/AA/a1.txt,a2.txt >> AA.log
dir A/BB/b1.txt,b2.txt >> BB.log
etc.
Hope this makes sense.
I've found the recursiveDirectoryIterator method as described in PHP SPL RecursiveDirectoryIterator RecursiveIteratorIterator retrieving the full tree being great help. I then use a for and a foreach loop to iterate through the directories, to write the text files, but I cannot break them into multiple files.

Answer 1

Most likely you are not filtering out the directories . and .. .
$maindir=opendir('A');
if (!$maindir) die('Cant open directory A');
while (true) {
$dir=readdir($maindir);
if (!$dir) break;
if ($dir=='.') continue;
if ($dir=='..') continue;
if (!is_dir("A/$dir")) continue;
$subdir=opendir("A/$dir");
if (!$subdir) continue;
$fd=fopen("$dir.log",'wb');
if (!$fd) continue;
while (true) {
$file=readdir($subdir);
if (!$file) break;
if (!is_file($file)) continue;
fwrite($fd,file_get_contents("A/$dir/$file");
}
fclose($fd);
}

Answer 2

I thought I'd demonstrate a different way, as this seems like a nice place to use glob.
// Where to start recursing, no trailing slash
$start_folder = './test';
// Where to output files
$output_folder = $start_folder;
chdir($start_folder);
function glob_each_dir ($start_folder, $callback) {
$search_pattern = $start_folder . DIRECTORY_SEPARATOR . '*';
// Get just the folders in an array
$folders = glob($search_pattern, GLOB_ONLYDIR);
// Get just the files: there isn't an ONLYFILES option yet so just diff the
// entire folder contents against the previous array of folders
$files = array_diff(glob($search_pattern), $folders);
// Apply the callback function to the array of files
$callback($start_folder, $files);
if (!empty($folders)) {
// Call this function for every folder found
foreach ($folders as $folder) {
glob_each_dir($folder, $callback);
}
}
}
glob_each_dir('.', function ($folder_name, Array $filelist) {
// Generate a filename from the folder, changing / or \ into _
$output_filename = $_GLOBALS['output_folder']
. trim(strtr(str_replace(__DIR__, '', realpath($folder_name)), DIRECTORY_SEPARATOR, '_'), '_')
. '.txt';
file_put_contents($output_filename, implode(PHP_EOL, $filelist));
});