chamilo / chamilo-lms

        echo get_lang('SelectXAxis').': ';

        echo '<select name="xaxis">';

        echo '<option value="">---</option>';

        foreach ($questions as $key => & $question) {

            if (is_array($allowed_question_types)) {

                if (in_array($question['type'], $allowed_question_types)) {

                    echo '<option value="'.$question['question_id'].'"';

                    if (isset($_GET['xaxis']) && $_GET['xaxis'] == $question['question_id']) {

                        echo ' selected="selected"';

                    }

                    echo '">'.api_substr(strip_tags($question['question']), 0, 50).'</option>';

                }

            }

        }

        echo '</select><br /><br />';

        // Y axis

        echo get_lang('SelectYAxis').': ';

        echo get_lang('SelectYAxis').': ';

        echo '<select name="yaxis">';

        echo '<option value="">---</option>';

        foreach ($questions as $key => &$question) {

            if (in_array($question['type'], $allowed_question_types)) {

                echo '<option value="'.$question['question_id'].'"';

                if (isset($_GET['yaxis']) && $_GET['yaxis'] == $question['question_id']) {

                    echo ' selected="selected"';

                }

                echo '">'.api_substr(strip_tags($question['question']), 0, 50).'</option>';

            }

        }

        echo '</select><br /><br />';

        echo '<button class="save" type="submit" name="Submit" value="Submit">'.get_lang('CompareQuestions').'</button>';

        echo '</form>';