Question

我不想捕获下一个数组值并将其与当前数组值进行比较。我尝试在$key+1中使用foreach执行此操作，但除了获取前一个值之外，它会运行当前的两次。有人能帮助我吗？

var_dump数组

array(5) { [0]=> string(1) "1" [1]=> string(1) "1" [2]=> string(1) "1" [3]=> string(1) "0" [4]=> string(0) "" }

代码：

foreach ($q_switch as $key => $value) {

            if ( $q_switch[$key+1] == 0 || empty($q_switch[$key+1]) ) {
                $question_html .= ""
            } else {
                $question_html .=  '<div class="question-wrapper">
                <form method="post">    
                    <div class="wp-postquiz-question">' . $q_question . '</div>
                    <div class="wp-postquiz-question-options">
                        <select name="answer-' . $question_no . '">
                            <option value="A">' .  $q_option_1 . '</option>
                            <option value="B">' .  $q_option_2 . '</option>
                            <option value="C">' .  $q_option_3 . '</option>
                            <option value="D">' .  $q_option_4 . '</option>
                        </select>
                    </div>
                    <input type="hidden" name="question-no" value="' . $question_no . '">
                    <input type="hidden" name="post-id" value="' . $postid . '">
                    <input type="hidden" name="action" value="answer-submitted">
                    <input type="submit" name="submit" class="button primary" value="Answer!">
                </form>
            </div>';
            }
        }

Answer 1

我不确定您要实现的目标但是通过查看您的代码，您似乎想要逃避由 0 和'组成的值（null / empty）值。因此，不要使用foreach循环，而是更好地使用array_filter函数，只需将您的其余代码发布在foreach

中

$q_switch = array('0'=>"1",'1'=>"1",'2'=>"1",'3'=>"0",'4'=>"");
$result = array_filter($q_switch);
print_r($result);//Array ( [0] => 1 [1] => 1 [2] => 1 )

Answer 2

感谢所有解决方案的人。我尝试的代码工作正常，但问题是我在int中取值，结果是值存储在字符串中。此外，我最终删除了foreach循环，并通过在当前问题中添加1来捕获下一个值。所以基本上整个功能看起来像下面，以防有人需要它......

/**
 * Get Question from Database for the post
 * @param  [int] $question_no 
 * @return [string]          
 */
function wp_postquiz_display_question($question_no) {

    // Get the total answered questions by the user.
    do_action('wp_postquiz_total_answered_questions_by_user' );

    // Check if Post Quiz is enabled or disabled.
    global $questions, $answeredQuestions;

    // Create $q_switch array
    $q_switch = array();

    // Get the post id in which quis is being used.
    $postid = get_the_ID();

    // Question Details
    $q_post_content     = $questions['question-' . $question_no . '']['content']; 
    $q_question         = $questions['question-' . $question_no . '']['question'];
    $q_option_1         = $questions['question-' . $question_no . '']['options']['option-1'];
    $q_option_2         = $questions['question-' . $question_no . '']['options']['option-2'];
    $q_option_3         = $questions['question-' . $question_no . '']['options']['option-3'];
    $q_option_4         = $questions['question-' . $question_no . '']['options']['option-4'];

    // HTML to return
    $question_html = '<div class="wp-postquiz-wrapper">
            <div class="wp-postquiz content">' . $q_post_content . '</div>';

    $currnetQuestion = "post-" . $postid . "-question-" . $question_no;

    // If previous question is answered don't include the question for it.
    if ( !in_array($currnetQuestion, $answeredQuestions) ){

        $next = $question_no + 1;
        $q_switch = $questions['question-' . $question_no . '']['q_switch'];
        $q_switch_next = $questions['question-' . $next . '']['q_switch'];

        if ( $q_switch == 1 && !empty($q_switch_next) )  {
                $question_html .=  '<div class="question-wrapper">
                <form method="post">    
                    <div class="wp-postquiz-question">' . $q_question . '</div>
                    <div class="wp-postquiz-question-options">
                        <select name="answer-' . $question_no . '">
                            <option value="" disabled selected>Select the correct answer</option>
                            <option value="A">' .  $q_option_1 . '</option>
                            <option value="B">' .  $q_option_2 . '</option>
                            <option value="C">' .  $q_option_3 . '</option>
                            <option value="D">' .  $q_option_4 . '</option>
                        </select>
                    </div>
                    <input type="hidden" name="question-no" value="' . $question_no . '">
                    <input type="hidden" name="post-id" value="' . $postid . '">
                    <input type="hidden" name="action" value="answer-submitted">
                    <input type="submit" name="submit" class="button primary" value="Answer!">
                </form>
            </div>';                
        }
    }

    $question_html .= '</div>';

    echo $question_html;
}

在foreach中捕获数组的下一个值

2 个答案: