}
return false;
}
$student_id = $_GET['student_id'];
$subject_ids = $_POST['subject_ids'];
$student_grades = Grade::get_by_sql("SELECT * FROM " . T_STUDENT_GRADES . " WHERE " . C_GRADE_STUDENT_ID . "=" . $student_id);
$student_subjects = array();
foreach ($student_grades as $student_subject) {
array_push($student_subjects, Subject::get_by_id($student_subject->subject_id));
}
$warnings = "";
foreach ($subject_ids as $id) {
$thestudent = Student::get_by_id($student_id);
$thestudent->semester = Subject::get_by_id($id)->semester;
$thestudent->update();
if (Grade::exists($id, $student_id)) {
$newgrade = Grade::get_by_subj_stud($id, $student_id);
$newgrade->delete();
}
$newgrade = new Grade();
$newgrade->subject_id = $id;
$newgrade->student_id = $student_id;
$newgrade->grade = 0;
$newgrade->create();
$pre_subject = Subject::get_by_id($id);
if (!EvaluatedSubject::exists($id, $student_id)) {
$grade = Grade::get_by_subj_stud($pre_subject->id, $student_id);
$gradepre = Grade::get_by_subj_stud($pre_subject->prereq_subject_id, $student_id);
if (has_prerequisite($pre_subject->prereq_subject_id, $student_subjects)) {
if ($gradepre != null) {
if (Grade::get_by_subj_stud($pre_subject->prereq_subject_id, $student_id)->grade <= 74) {
