php directory iterator list aplhabetically - php

Question

For a project we have created a recursive direcory iterator inside a class
the class is as follows
class Helpers {
public static function fs_to_array($directory){
$iritator = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($directory), \RecursiveIteratorIterator::CHILD_FIRST);
$array_result = array();
foreach ($iritator as $splFileInfo) {
$fn = $splFileInfo->getFilename();
if ($splFileInfo->isDir()){
if ($fn == '..' || $fn == '.' ){
continue;
}
$rec_path = array($fn => array());
}else{
continue;
}
for ($depth = $iritator->getDepth() - 1; $depth >= 0; $depth--) {
$rec_path = array($iritator->getSubIterator($depth)->current()->getFilename() => $rec_path);
}
$array_result = array_merge_recursive($array_result, $rec_path);
}
return $array_result;
}
}
it takes a directory as an argument and returns the dir structure in the following form
Array
(
[dir3] => Array
(
[dir_in_dir3] => Array
(
)
)
[dir1] => Array
(
[dir_in_dir1] => Array
(
)
)
[dir2] => Array
(
)
)
I would like these to be allphavetically sorted.
How Can i make this with the iterator?
Thanks everybody in advance!

Answer 1

An iterator can't be sorted directly and the directory iterators also have not support for sorting of the underlying data. But you can convert the RecursiveIteratorIterator to an array with iterator_to_array() and then sort the array with usort() and a custom callback function using getPathName() on the elements. You could also use a CallbackFilterIterator() before the conversion to reduce the size of your array.
EDIT example:
$directory = '...';
$it = new CallbackFilterIterator(
new RecursiveIteratorIterator(
new RecursiveDirectoryIterator($directory), RecursiveIteratorIterator::CHILD_FIRST
), function ($entry) {
// filtering unwanted elements to keep array small
$fn = $entry->getFilename();
if (!$entry->isDir()) {
return false;
} else if ($fn == '..' || $fn == '.') {
return false;
} else {
return true;
}
}
);
$array = iterator_to_array($it);
// sorting entries
uasort($array, function ($a, $b) {
return strcmp($a->getPathname(), $b->getPathname());
});
// do whatever you want - can be uses just like the RecursiveIteratorIterator before
foreach ($array as $v) {
var_dump($v->getPathname());
}