PHPMailer 发生致命错误

Question

我正在尝试使用 PHPMailer 通过 gmail SMTP 服务器发送邮件，但出现致命错误，并且找不到任何解决方案

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我的 php 文件

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<?php\nuse PHPMailer\\PHPMailer\\PHPMailer;\nuse PHPMailer\\PHPMailer\\Exception;\n\nrequire "phpmailer/PHPMailer.php";\nrequire "phpmailer/SMTP.php";\nrequire "phpmailer/Exception.php";\n\n$error_msg=null;\n$success_msg=null;\n\nif ($_POST) {\n    //$name = isset($_POST['name']) ? filter_var($_POST['name'], FILTER_SANITIZE_STRING) : null;\n    //$email = isset($_POST['email']) ? filter_var($_POST['email'], FILTER_VALIDATE_EMAIL) : null;\n    //$message = htmlspecialchars($_POST['message']);\n\n    $name = $_POST['name'];\n    $email = $_POST['email'];\n    $message = $_POST['message'];\n\n    if (empty($name) || empty($email) || empty($message)) {\n        $error_msg = 'Fill out required entry fields!';\n    }\n\n    if (is_null($error_msg)) {\n\n        $mail = new PHPMailer(TRUE);\n\n        $mail->isSMTP();\n        $mail->Host = "smtp.gmail.com";\n        $mail->SMTPAuth = true;\n        $mail->Username = "mail@gmail.com";\n        $mail->Password = "";\n        $mail->SMTPSecure = "tls";\n        $mail->Port = 587;\n\n        $mail->isHTML(true);\n        $mail->setFrom($email, $name);\n        $mail->addAddress("mail@gmail.com");\n        $mail->Subject = "Nowa wiadomo\xc5\x9b\xc4\x87 z formularza kontaktowego";\n        $mail->Body = $message;\n\n        $mail->send();\n\n        $success_msg = "Message sent.";\n    }\n}\n?>\n

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html表格

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<div class="h-100 d-flex justify-content-center align-items-center">\n    <div class="row">\n        <div class="col-md-12 rounded">\n            <?php echo $lang['contact_desc']?>\n\n            <?php if ($error_msg) : ?>\n                <div class="alert alert-danger"><?php echo $error_msg; ?></div>\n            <?php endif; ?>\n\n            <?php if ($success_msg) : ?>\n                <div class="alert alert-success"><?php echo $success_msg; ?></div>\n            <?php endif; ?>\n            <form id="myform" method="post">\n                <label for="name"><?php echo $lang['name']?></label>\n                <input type="text" name="name" id="name" placeholder="<?php echo $lang['name']?>" required>\n\n                <label for="email">Email</label>\n                <input type="email" name="email" id="email" placeholder="example@example.com" required>\n\n                <label for="message"><?php echo $lang['message']?></label>\n                <textarea name="message" id="message" placeholder="<?php echo $lang['msg_content']?>" required></textarea>\n\n                <input type="submit" name="submit" value="<?php echo $lang['submit']?>">\n            </form>\n        </div>\n    </div>\n</div>\n

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我得到的错误：

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致命错误：未捕获错误：未定义常量 PHPMailer\\PHPMailer\\FILTER_FLAG_HOST_REQUIRED" in C:\\xampp\\htdocs\\phpmailer\\PHPMailer.php:3598 堆栈跟踪：#0 C:\\xampp\\htdocs\\ phpmailer\\PHPMailer.php(3564): PHPMailer\\PHPMailer\\PHPMailer::isValidHost('localhost') #1 C:\\xampp\\htdocs\\phpmailer\\PHPMailer.php(2304): PHPMailer\\ PHPMailer\\PHPMailer->serverHostname() #2 C:\\xampp\\htdocs\\phpmailer\\PHPMailer.php(1421): PHPMailer\\PHPMailer\\PHPMailer->createHeader() #3 C:\\xampp \\htdocs\\phpmailer\\PHPMailer.php(1316): PHPMailer\\PHPMailer\\PHPMailer->preSend() #4 C:\\xampp\\htdocs\\scripts\\form.php(43): PHPMailer \\PHPMailer\\PHPMailer->send() #5 C:\\xampp\\htdocs\\contact.php(3): include('C:\\xampp\\htdocs...') #6 {main } 抛出在 C:\\xampp\\htdocs\\phpmailer\\PHPMailer.php 第 3598 行

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有任何想法吗？

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Answer 1

过滤FILTER_FLAG_HOST_REQUIRED 器标志在 PHP 7.3 中已被弃用，并且 PHPMailer 代码库中不再有任何对其的引用。因此，一个简单的修复方法应该是简单地更新 PHPMailer。如果您使用的是 Composer，这将是自动的并且非常简单，但您没有，因此您必须下载最新版本并根据自述文件自行安装。