我正在使用 php 和 bootstrap 構(gòu)建一個(gè)聯(lián)系表單，我想在發(fā)生錯(cuò)誤時(shí)顯示 bootstrap 警報(bào)。所以我現(xiàn)在的問(wèn)題是我已經(jīng)讓代碼工作并且它檢查錯(cuò)誤但是在錯(cuò)誤發(fā)生之前顯示錯(cuò)誤警報(bào)對(duì)話框我試圖將錯(cuò)誤對(duì)話框移到 HTML 下方，但我仍然遇到相同的錯(cuò)誤$email = $name = $subject = $message = '';$errors = ['email' => '', 'name' => '', 'subject' => '', 'message' => ''];if (isset($_POST['submit'])) { // check email if (empty($_POST['email'])) { $errors['email'] = "An email is required !"; } else { $email = $_POST['email']; if (!filter_var($email, FILTER_VALIDATE_EMAIL)) { $errors['email'] = "Enter a validemail address !"; } } <div class="form-group"> <label for="email" class="bmd-label-floating">Email address</label> <input type="email" class="form-control" name="email" value="<?php htmlspecialchars($email)?>"> <div class="mt-2 alert alert-warning alert-dismissible fade show" role="alert"> <?php echo $errors['email'] ?> </div></div>預(yù)期的行為應(yīng)該是在錯(cuò)誤發(fā)生時(shí)在錯(cuò)誤對(duì)話框中顯示錯(cuò)誤，而不是在錯(cuò)誤發(fā)生之前出現(xiàn)錯(cuò)誤對(duì)話框
2 回答
慕桂英3389331
TA貢獻(xiàn)2036條經(jīng)驗(yàn) 獲得超8個(gè)贊
您想用 an 包裝模態(tài)if以檢查是否確實(shí)存在錯(cuò)誤。
<?php if($errors['email']): ?>
<div class="mt-2 alert alert-warning alert-dismissible fade show" role="alert">
<?php echo $errors['email'] ?>
</div>
<?php endif; ?>
守著星空守著你
TA貢獻(xiàn)1799條經(jīng)驗(yàn) 獲得超8個(gè)贊
在顯示錯(cuò)誤之前添加檢查。喜歡下面
<?php
if(isset($errors['email']) && $errors['email']!=''){
?>
<div class="mt-2 alert alert-warning alert-dismissible fade show" role="alert">
<?php echo $errors['email']; ?>
</div>
<?php } ?>
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