list files from folder, only one for each date

[jasonc]

I have many files in a folder and wish to only list one of each date

 

these are the file names.

date format (dd/mm/yyy)

 

abc - 12-01-2009 - something.pdf

abc - 12-01-2009 - something else.pdf

abc - 12-01-2009 - another title.pdf

abc - 24-05-2009 - some other text

abc - 24-05-2009 - yet more files

abc - 24-05-2009 - yet another title.pdf

 

if i had these files then i would like the results to be

 

12-01-2009

24-05-2009

 

in an array

 

 

at present i have this script..

 

$files = glob('agendas/*.pdf');
$sortfile = array();
foreach($files as $file){
//Extract date
	if (preg_match('/(\d+)-(\d+)-(\d+)[^.]*?\.pdf/', $file, $reg)) {
	//if (preg_match('/(\d+)-(\d+)-(\d+)-Agenda Item (\d+)[^.]*?\.pdf/', $file, $reg)) {
	//add date to array (file as key)
	$sortfile[$file] = mktime(0,0,0,$reg[2],$reg[1],$reg[3]);
	}
}

 

this only gets the files but i would like to have these files sorted and have only one of each date

 

how would this be done.