PHP: Mulitiple Arrary Sort

I've gotten the one array down and I've figured out how to sort that array, however, I need to sort the array by the modified date of the file. Here's what I got so far: <?php // Open current directory if($handle = opendir($dir)){ // Loop through all files while(false !== ($file = readdir($handle))){ // Ignore hidden files if(!preg_match("/^\./", $file)){ // Put dirs in $dirs[] and files in $files[] if(is_dir($file)){ $dirs[] = $file; }else{ $files[] = $file; } } } // Close directory closedir($handle); // if $files[] exists, sort it and print all elements in it. if(is_array($files)){ //HERE IS MY CURRENT SORT WHICH I KNOW I NEED TO CHANGE BUT AM UNSURE HOW sort($files); foreach($files as $file){ $completeFileName = $dir . $file; //I WANT TO SORT BY THIS echo date("m-d-Y", filemtime($completeFileName)) . "<br>"; } } } ?> Any ideas on how to fix this? Thanks