\n"; if($num_subject_compexp > 0) { $retval = 1; // subject has already started this experiment, BREAK for ($iii = 1; $iii <= $num_subject_compexp; $iii++) { $row_result_subject_compexp = mysql_fetch_assoc($result_subject_compexp); if (strlen(chop($row_result_subject_compexp['end_datetime'])) > 0) { // subject has completed this session $retval = 2; return $retval; } } } return $retval; } ?>