#region generate form-data
$formdata = array();
if (isset($exercise['choices'])) {
$formtext = $exercise['choices'];
foreach ($formtext as $formId => $choiceData2) {
$form = new Form();
$form->setFormId($formId);
$form->setExerciseId($exerciseId);
$choiceText = $choiceData2;
$choices = array();
foreach ($choiceText as $tempKey => $choiceData) {
if (trim($choiceData) === '') {
continue;
}
$choice = new Choice();
$choice->SetText(htmlentities(htmlentities(htmlspecialchars_decode($choiceData))));
$choice->SetFormId($formId);
$choices[] = $choice;
}
if ($choices !== null && $choices !== array()) {
$form->setChoices($choices);
$formdata[] = $form;
}
}
}
#endregion
if (isset($_FILES[$fileName]) || $formdata !== array()) {
$error = 0;
if (isset($_FILES[$fileName])) {
$file = $_FILES[$fileName];
$error = $file['error'];
$replace = false;
$replace = texify('$' . $mathTex . '$');
if ($replace === false) {
$replace = '<img src="http://latex.codecogs.com/gif.latex?' . rawurlencode($mathTex) . '">';
}
$solution = substr($solution, 0, $pos) . $replace . substr($solution, $pos2 + strlen($second));
}
$pos = strpos($solution, $first, $pos + strlen($first) + strlen($second));
}
$formId = isset($subexercise['formId']) ? $subexercise['formId'] : null;
$form = Form::createForm($formId, $exerciseId, $solution, $task, isset($subexercise['type']) ? $subexercise['type'] : null);
$choiceText = $subexercise['choice'];
$choices = array();
foreach ($choiceText as $tempKey => $choiceData) {
$choice = new Choice();
$choice->SetText($choiceData);
$choices[$tempKey] = $choice;
}
if (isset($subexercise['correct'])) {
$choiceCorrect = $subexercise['correct'];
foreach ($choiceCorrect as $tempKey => $choiceData) {
$keykey = $choiceData;
if ($keykey == '') {
$keykey = $tempKey;
}
if (isset($choices[$keykey])) {
$choices[$keykey]->setCorrect(1);
}
}
}
if (isset($subexercise['choiceId'])) {
