我已經設置了 PHP 郵件程序來在我的網站上傳遞聯系表單信息。我在整理多個復選框輸入時遇到問題。它在電子郵件中顯示為空。這里是表單 HTML 代碼：<div class="form-group">            <label class="checkbox-inline">                <input name="time" type="checkbox" id="inlineCheckbox1" value="AM"> AM            </label>            <label class="checkbox-inline">                <input name="time" type="checkbox" id="inlineCheckbox2" value="PM"> PM            </label>        </div>在我的 PHP 代碼中，我添加了以下內容來檢查復選框是否有輸入：if($_POST["time"])  {        $time_array = $_POST['time'];        $time_tostring = implode(", ", $time_array);     }然后在郵件代碼中，我添加了以下內容：$mail = new PHPMailer(true);try {    //Server settings    $mail->isSMTP();    $mail->Host = $config['host'];    $mail->SMTPAuth = true;    $mail->Username = $config['username'];    $mail->Password = $config['password'];    $mail->SMTPSecure = $config['secure'];    $mail->Port = $config['port'];    //Recipients    $mail->setFrom($config['from'], $config['fromName']);    $mail->addAddress($config['sendTo']);    //$mail->addCC($config['sendToCC']);                $mail->addBCC($config['sendToBCC']);                //Content    $mail->isHTML(true);    $mail->Subject = 'Website Contact Form';    $mail->Body    = '<p>Emptied on: ' . $_POST['day'] . "</p>"    . "<p>Time: "  . $time_tostring . "</p>"            . "<p>Name: " . $_POST['name'] . "</p>"    . "<p>Address: " . $_POST['address'] . "</p>"    . "<p>Phone Number: " . $_POST['number'] . "</p>"    . "<p>Email: " . $_POST['email'] . "</p>"    . "<p>Where did you hear about us: " . $_POST['how'] . "</p>"    . "<p>Service interested in: " . $_POST['comments'] . "</p>"            ;    $mail->send();    echo json_encode(['status' => true, "data" => 'Message has been sent']);} catch (Exception $e) {    echo json_encode(['status' => false, "data" => "Message could not be sent\nMailer Error: " . $mail->ErrorInfo]);}發送的郵件中，時間為空，不顯示任何值。我也直接嘗試了下面的行，但它也不起作用。. "<p>Time: "  . implode(', ', $_POST['time']) . "</p>" 我不知道為什么這不起作用。任何想法都是值得贊賞的。