static function ListByExt
Prototype:
static function ListByExt(directory, ext_arr, nodir);
Parameters
directory
the path that you want to list
ext_arr
an array containing the required file extension; if ext_arr is ["*"] will show all files
nodir
true or false. True if you need to exclude all the directories from the results.
Description:
Lists the items in the current directory if match a given list of extension.
Return value:
Returns an array containing the filenames.