public function ShortAnswerQuestion::evaluateAnswer in Quiz 7.5

Same name and namespace in other branches

1. 6.6 question_types/short_answer/short_answer.classes.inc \ShortAnswerQuestion::evaluateAnswer()
2. 6.3 question_types/short_answer/short_answer.classes.inc \ShortAnswerQuestion::evaluateAnswer()
3. 6.4 question_types/short_answer/short_answer.classes.inc \ShortAnswerQuestion::evaluateAnswer()
4. 6.5 question_types/short_answer/short_answer.classes.inc \ShortAnswerQuestion::evaluateAnswer()
5. 7.6 question_types/short_answer/short_answer.classes.inc \ShortAnswerQuestion::evaluateAnswer()
6. 7 question_types/short_answer/short_answer.classes.inc \ShortAnswerQuestion::evaluateAnswer()
7. 7.4 question_types/short_answer/short_answer.classes.inc \ShortAnswerQuestion::evaluateAnswer()

Evaluate the correctness of an answer.

The way we decide how to evaluate the correctness depends on the evaluation method of the question.

Parameters

string $user_answer: The answer given by the user.

Return value

int The given score for the answer.

File

question_types/short_answer/short_answer.classes.inc, line 236

Short answer classes.

Class

ShortAnswerQuestion

Extension of QuizQuestion.

Code

public function evaluateAnswer($user_answer) {
  $score = 0;

  // Ignore white spaces for correct answer and user's answer.
  $user_answer = trim($user_answer);
  $this->node->correct_answer = trim($this->node->correct_answer);
  switch ($this->node->correct_answer_evaluation) {
    case self::ANSWER_MATCH:
      if ($user_answer == $this->node->correct_answer) {
        $score = $this->node->max_score;
      }
      break;
    case self::ANSWER_INSENSITIVE_MATCH:
      if (drupal_strtolower($user_answer) == drupal_strtolower($this->node->correct_answer)) {
        $score = $this->node->max_score;
      }
      break;
    case self::ANSWER_REGEX:
      if (preg_match($this->node->correct_answer, $user_answer) > 0) {
        $score = $this->node->max_score;
      }
      break;
  }
  return $score;
}