Something

<?php#filename counter$counter=1;#open a pipe with results from the find command$handle = popen("find foldername -name '*.jpg'", 'r');while(!feof($handle)) {   $orig_filename = fgets($handle);   $new_filename=sprintf("%05d.jpg",$counter);   # rename   shell_exec('mv "'.$orig_filename.'" "'.$new_filename.'"');   $counter++;}pclose($handle);?>