/**
* Return the 'distance' of the user's answer from the correct answer as a percentage of the correct answer
* @return float Distance from the correct answer
*/
public function get_answer_distance()
{
if (!isset($this->useranswer['cans_dist'])) {
$enhancedcalcType = $this->configObj->get('enhancedcalc_type');
if (!is_null($enhancedcalcType)) {
require_once $enhancedcalcType . '.php';
$name = 'enhancedcalc_' . $enhancedcalcType;
$enhancedcalcObj = new $name($this->configObj->getbyref($enhancedcalcType));
} else {
require_once 'Rrserve.php';
$enhancedcalcObj = new EnhancedCalc_Rrserve($this->configObj->getbyref('enhancedcalculation'));
}
if (isset($this->useranswer['status']['exact']) and $this->useranswer['status']['exact'] === false or !isset($this->useranswer['status']['exact'])) {
$this->useranswer['cans_dist'] = $enhancedcalcObj->distance_from_correct_answer($this->useranswer['uansnumb'], $this->useranswer['cans']);
} else {
$this->useranswer['cans_dist'] = '0';
}
}
$data = false;
if (isset($this->useranswer['cans_dist']) and $this->useranswer['cans_dist'] !== 'ERROR') {
$data = $this->useranswer['cans_dist'];
}
return $data;
}
} else {
$variable_array = array();
}
$varno = 0;
foreach ($variable_array as $individual_variable) {
if ($individual_variable != '') {
$varsdata[$vars[$varno]] = $individual_variable;
}
$varno++;
}
if (isset($varsdata)) {
$new_user_answer['vars'] = $varsdata;
}
$new_user_answer['original'] = $user_answer;
// Calculate distance from correct if needed
$new_user_answer['cans_dist'] = $enhancedcalcObj->distance_from_correct_answer($new_user_answer['uansnumb'], $new_user_answer['cans']);
$jsoned = json_encode($new_user_answer);
$update->bind_param('si', $jsoned, $uid);
$update->execute();
$loop++;
if ($loop % 200 == 0) {
$mysqli->commit();
echo '<br>';
@ob_flush();
}
}
}
$mysqli->commit();
$update->close();
$result->close();
}
