How do you scan the directory case insensitive?

Question

I want to get files from a directory. And I don't if it is uppercase or lowercase. How do I scan the directory case insensitive in php?

strtolower(scandir($directory, SCANDIR_SORT_ASCENDING)); ???

score 3 · Accepted Answer · answered Nov 17 '16 at 21:41

3

scandir() returns an array, strtolower() only works on strings. You need to use array_map() to run the function on all the names returned:

$filenames = array_map('strtolower', scandir($directory));

Since the sorting done by scandir is case-sensitive, you should sort $filenames after you retrieve them.

sort($filenames);

answered Nov 17 '16 at 21:41

Barmar

Thank you very much. I don't know much about php. And I can hardly debug it. So it's difficult to see what I'm doing wrong too. – user1531040 Nov 18 '16 at 07:46
I try this $result = array_map('strtolower', scandir($directory, SCANDIR_SORT_ASCENDING)); And this works too. – user1531040 Nov 18 '16 at 07:47
That will sort the names case-sensitively. – Barmar Nov 18 '16 at 16:23

score 1 · Answer 2 · answered Jan 19 '22 at 10:31

1

This one preserves the upper and lower case in the array but sorts it case insensitive.

$filenames = scandir($directory, SCANDIR_SORT_NONE);
natcasesort($filenames);

answered Jan 19 '22 at 10:31

shaack

2 Answers2