Case Insensitive sorting

[Anon]

I am trying to sort an array by letter, however there is a mixture of Lower case and upper case and it is ordered By upper fisrt and then by lower case.

I would like to ignore the case ofd the first letter as it is critical to the function that is running.

$handle = opendir("$publishdir");
$i = 0;
while ($file = readdir($handle)) {
if ($file != "." && $file != ".." && !ereg("^x", $file)) {
$users[$i] = $file;
$i++;
}
}
//sort usernames
sort($users);
closedir($handle);

I'm thinking of writing a bubble sort,but my fear is that it will be slow as there are over a 1000 entries.

Any suggestions would be most appreciated

Cheers

Nick

[Anon]

Hi, I know this thread's a bit dated, but I found it.. so other people might, Doing a bit of web searching I found this page:

http://www.planet-source-code.com/vb/scripts/ShowCode.asp?txtCodeId=11&lngWId=8

This defines a custom sort function that can be used with usort to do a case insensitive

The function is:

function isort($a,$b){
if(ord(substr(strtolower($a),0,1)) == ord(substr(strtolower($b),0,1))) return 0;
return (ord(substr(strtolower($a),0,1)) < ord(substr(strtolower($b),0,1))) ? -1 : 1;
}

USAGE: usort($array_to_sort, "isort");

Hope this helps someone