Question

随机化功能可以很好地与问题随机播放数组配合使用。每次随机化工作时，如何从N中选择特定数量的数字从数组中删除。表示如果我们希望以随机模式每次显示100个问题列表中的20％或20个问题

public function random_questions( $quiz_questions, $quiz_id ) {
    if ( get_post_meta( $quiz_id, '_lp_random_mode', true ) == 'yes' ) {
        // get user meta random quiz
        $random_quiz = get_user_meta( get_current_user_id(), 'random_quiz', true );
        if ( is_admin() || empty( $random_quiz ) || empty( $random_quiz[ $quiz_id ] ) ) {
            return $quiz_questions;
        }
        $questions = array();
        if ( array_key_exists( $quiz_id, $random_quiz ) && sizeof( $random_quiz[ $quiz_id ] ) == sizeof( $quiz_questions ) ) {
            foreach ( $random_quiz[ $quiz_id ] as $question_id ) {
                if ( $question_id ) {
                    $questions[ $question_id ] = $question_id;
                }
            }
        } else {
            $question_ids = array_keys( $quiz_questions );
            shuffle( $question_ids );
            $random_quiz[ $quiz_id ] = $question_ids;
            $questions               = array();
            foreach ( $question_ids as $id ) {
                $questions[ $id ] = $quiz_questions[ $id ];
            }
        }
        return $questions;
    }
    return $quiz_questions;
}

Answer 1

使用array_rand()随机选择数组键，而不是将所有键与array_keys()一起使用。这样就不必重新整理数组。

        $question_ids = array_rand( $quiz_questions , 20);
        $random_quiz[ $quiz_id ] = $question_ids;
        $questions               = array();
        foreach ( $question_ids as $id ) {
            $questions[ $id ] = $quiz_questions[ $id ];
        }

仅显示随机数组中特定数量的问题

1 个答案: