php - 为什么这个验证码没有按预期工作？

Question

我有一个表单，并且 for m 的操作是同一页。我正在尝试:

1. 在成功提交表单时显示感谢信息
2. 在检测到错误的字段旁边显示错误消息
3. 以上所有内容必须显示在同一页面中。

我的代码是:

<?php
    $errors = array();
    if (isset($_POST["Ask_the_Question"])) {
        $guest_name = $_POST["guest_name"];
        $title = $_POST["faq_title"];
        $description = $_POST["faq_desc"];
        $title = $_POST["faq_title"];

        /* validation */
        if (empty($guest_name)) {
            $errors['guest_name'] = "Please type your name!";
        }   

        if(!empty($errors)){ echo '<h1 style="color: #ff0000;">Errors!</h1><h6 style="color: #ff0000;">Please check the fields which have errors below. Error hints are in Red.</h6>';}

        if(empty($errors)){     
            echo 'Thanks, We have received your feed back';
        }
    }

    else {
?>
            <form action="index.php" method="post" class="booking_reference">
                <input type="text" name="guest_name" placeholder="Your Name" value="<?PHP if(!empty($errors)) { echo $guest_name;} ?>" />
                <?php if(isset($errors['guest_name'])) { echo '<span style="color: red">'.$errors['guest_name'].'</span>'; } ?>
                <input type="email" name="guest_email" placeholder="Your email" pattern="[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,4}$" required />
                <input type="text" name="faq_title" placeholder="FAQ Title"/>
                <input type="text" name="faq_desc" placeholder="FAQ Description"/>
                <input type="submit" name="Ask_the_Question" value="Ask the Question" />
            </form>
<?php
        }
?>

我限制了验证，只显示了这个问题的第一部分。

当我提交此表单时，如果没有任何错误，我将收到消息谢谢，我们已收到您的反馈这很好，并且按预期工作。

当存在错误/字段客人姓名 为空时，我在表单提交过程中收到消息错误!请检查以下有错误的字段。错误提示为红色。这也很好。

但是当我收到上述消息时，我的表单就消失了。为什么？我还想在字段旁边显示请输入您的姓名!。

Answer 1

试试下面的代码。我已经删除了 else 部分并设置了 true/false 标志以检查是否有效。

<?php
    $errors = array();
    if (isset($_POST["Ask_the_Question"])) {
        $guest_name = $_POST["guest_name"];
        $title = $_POST["faq_title"];
        $description = $_POST["faq_desc"];
        $title = $_POST["faq_title"];

        /* validation */
        $chkValidate = "true";
        if (empty($guest_name)) {
            $errors['guest_name'] = "Please type your name!";
            $chkValidate = "false";
        }   

        if(!empty($errors)){ echo '<h1 style="color: #ff0000;">Errors!</h1><h6 style="color: #ff0000;">Please check the fields which have errors below. Error hints are in Red.</h6>';
            $chkValidate = "false";
        }

        if($chkValidate == "true"){     
            echo 'Thanks, We have received your feed back';
        }
    }
    ?>
            <form action="index.php" method="post" class="booking_reference">
                <input type="text" name="guest_name" placeholder="Your Name" value="<?php if(!empty($errors) && $chkValidate != "false") { echo $guest_name;} ?>" />
                <?php if(isset($errors['guest_name'])) { echo '<span style="color: red">'.$errors['guest_name'].'</span>'; } ?>
                <input type="email" name="guest_email" placeholder="Your email" pattern="[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,4}$" required  />
                <input type="text" name="faq_title" placeholder="FAQ Title"/>
                <input type="text" name="faq_desc" placeholder="FAQ Description"/>
                <input type="submit" name="Ask_the_Question" value="Ask the Question" />
            </form>
<?php

?>