## Get Unique ID Passed from PHP my $sid = (split(/[&=]/,$ENV{QUERY_STRING}))[1]; $sid =~ s/[^a-zA-Z0-9]//g;    ## Define Directory Paths (Must be Absolute Paths) my $upload_dir = $ENV{'DOCUMENT_ROOT'}."/upload_fraeszentrum/"; my $tmp_dir = $ENV{'DOCUMENT_ROOT'}."/tmp/"; my $session_dir = $tmp_dir.$sid;