like if 1st file is found in while traversing thru dir/sub dir then values will :

$dir_names[0]=A2
$dir_names[1]=MIUY
$dir_names[2]=CCT
$filenames[0]=CCT023

likewise,when 2nd file is found in another sub directory then values will be :

$dir_names[0]=A2
$dir_names[1]=MIUY
$dir_names[2]=SST
$filenames[0]=RETEEYY