function wrsqz_multipleAnswersTable($answer, $variables, $names) {
$openmath = '<math xmlns="http://www.w3.org/1998/Math/MathML">';
$closemath = '</math>';
// x=v1;y=v2
if(!isset($names)) $names = $answer;
//clean $names array
$names = explode(' ',$names);
$cleanNames=array();
foreach ($names as $name){
if ($name[0]!='(') { //skip parameters
if($name[0]=='#'){
$name = mb_substr($name,1);
}
$cleanNames[]=$name;
}
}
//make values array
$vars = explode(' ',$answer);
$values=array();
foreach ($vars as $var){
if ($var[0]!='(') { // skip parameters
if($var[0]!='#') $var = '#'.$var;
$value = wrsqz_assemble(wrsqz_textToVariables($var), $variables);
//remove <math...> and </math>
$value = mb_substr($value,mb_strlen($openmath),-mb_strlen($closemath));
$values[] = $value;
}
}
//Write mathml
$r = $openmath .'<mtable columnalign="left" rowspacing="0">';
foreach ($cleanNames as $index => $name) {
if ($var[0]!='(') { // skip parameters
$r .= '<mtr><mtd>';
$r .= '<mi>' . $name . '</mi>';
$r .= '<mo>=</mo>';
$r .= $values[$index];
$r .= '</mtd></mtr>';
}
}
$r .= '</mtable>'. $closemath;
return $r;
}
function wrsqz_get_correct_responses($questionType, $dbType, $response, &$question, &$state, $mode = 'M') {
//mode='M' => MathML <math xmlns=".......
//mode='W' => encoded MathML for filtering �math xmlns=�...
//mode='T' => Plain Text 2^(1/2)...
if ($questionType == 'shortanswer') {
if (!is_array($response)){
$response = array();
}
mb_parse_str($question->options->wiris->eqoption, $eqoptionArray);
$editor = isset($eqoptionArray['editor']) && $eqoptionArray['editor'] == 'true';
$multipleAnswers = $editor && isset($eqoptionArray['multipleAnswers']) && $eqoptionArray['multipleAnswers'] == 'true';
//get the first maximum graded answer and, in the multipleanswer case,
//the names of the variables to be used (depending on if we use test
//functions or not).
if($question->options->answers){
foreach ($question->options->answers as $answer) {
if (((int) $answer->fraction) === 1) {
$correctanswer = $answer->answer;
if($multipleAnswers){
if (isset($eqoptionArray['testFunction']) && isset($eqoptionArray['testFunction'][$answer->id])){
$index = $eqoptionArray['testFunction'][$answer->id];
$names = $eqoptionArray['testFunctionName'][$index];
}else{
$names = $answer->answer;
}
}
}
}
}else{
$correctanswer=null;
}
//$correctanswer=#p
//encode it depending on the use of wiris editor and the desired mode
if ($editor) {
if ($multipleAnswers) {
if ($mode == 'T'){
//plain text for directly display (space separated)
$response['']=wrsqz_assemble(wrsqz_variablesToText($correctanswer), $state->vars);
}else if($mode == 'M'){
//mathml for an applet
$response['']=wrsqz_multipleAnswersTable($correctanswer,$state->vars,$names);
}else if($mode == 'W'){
//encoded mathml for filtering
$response['']=wrsqz_multipleAnswersTable($correctanswer,$state->vars, $names);
$response['']=wrsqz_mathmlEncode($response['']);
}
} else {
if ($mode == 'T'){
$response[''] = wrsqz_assemble(wrsqz_variablesToText($correctanswer), $state->vars);
}else if ($mode == 'M'){
$response[''] = wrsqz_assemble(wrsqz_textToVariables($correctanswer), $state->vars);
}else if ($mode == 'W'){
$response[''] = wrsqz_assemble($correctanswer, $state->vars);
}
}
} else {
//if editor is not used, we use text mode (T) always.
$response[''] = wrsqz_assemble(wrsqz_variablesToText($correctanswer), $state->vars);
}
}
return $response;
}