$msg = "Filetype not permitted: ";
if ( isset( $verification['blacklistedExt'] ) ) {
$msg .= join( ', ', $verification['blacklistedExt'] );
$extradata['blacklisted'] = array_values( $verification['blacklistedExt'] );
$msg = "Filetype not permitted: ";
if ( isset( $verification['blacklistedExt'] ) ) {
$msg .= join( ', ', $verification['blacklistedExt'] );
$extradata['blacklisted'] = array_values( $verification['blacklistedExt'] );