<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.error {color: #FF0000;}
</style>
</head>
<body>
<?php
// 初始化变量
$name = $
email = $message = "";
$nameErr = $
emailErr = "";
if ($_SERVER["REQUEST_METHOD"] == "
POST") {
// 验证姓名
if (empty($_
POST["name"])) {
$nameErr = "Name is required";
} else {
$name = test_input($_
POST["name"]);
if (!preg_match("/^[a-zA-Z ]*$/", $name)) {
$nameErr = "Only letters and white
space allowed";
}
}
// 验证电子邮件
if (empty($_
POST["
email"])) {
$
emailErr = "
Email is required";
} else {
$
email = test_input($_
POST["
email"]);
if (!filter_var($
email, FILTER_VALIDATE_
EMAIL)) {
$
emailErr = "Invalid
email format";
}
}
// 处理消息（可选）
if (empty($_
POST["message"])) {
$message = "";
} else {
$message = test_input($_
POST["message"]);
}
}
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>PHP Form Validation Example</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
</head>
<body>
<div class="container">
<h2>Contact Form</h2>
<form method="
post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>">
<div class="form-group">
<label for="name">Name:</label>
<input type="text" class="form-control <?php echo ($nameErr != "") ? 'is-invalid' : ''; ?>" id="name" name="name" value="<?php echo $name; ?>">
<span class="text-danger"><?php echo $nameErr; ?></span>
</div>
<div class="form-group">
<label for="
email">
Email:</label>
<input type="
email" class="form-control <?php echo ($
emailErr != "") ? 'is-invalid' : ''; ?>" id="
email" name="
email" value="<?php echo $
email; ?>">
<span class="text-danger"><?php echo $
emailErr; ?></span>
</div>
<div class="form-group">
<label for="message">Message:</label>
<textarea class="form-control" id="message" name="message"><?php echo $message; ?></textarea>
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
</div>
</body>
</html>
本文介绍了一种通过 Gmail 发送邮件到指定地址以简化博客发布流程的方法，使得作者不必再逐一手动打开邮件客户端进行发送。
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