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PHP form processing: form data persistence and temporary storage
Introduction:
In web development, forms are an important way for users to interact with the backend. When a user fills out a form and submits it, the backend needs to process the form data. This article will introduce how to use PHP to process form data, and discuss how to perform persistent storage and temporary storage of data.
1. Processing form data
$name = $_POST['name']; $email = $_POST['email'];
if (empty($name) || empty($email)) { echo "请填写必填字段"; } else if (!filter_var($email, FILTER_VALIDATE_EMAIL)) { echo "邮箱地址不合法"; } else { // 数据验证通过,可以进行下一步操作 }
2. Persistent storage of data
// 连接数据库 $host = "localhost"; $dbUsername = "root"; $dbPassword = ""; $dbName = "mydatabase"; $conn = new mysqli($host, $dbUsername, $dbPassword, $dbName); // 检查连接是否成功 if ($conn->connect_error) { die("连接失败: " . $conn->connect_error); } // 插入数据 $sql = "INSERT INTO users (name, email) VALUES ('$name', '$email')"; if ($conn->query($sql) === TRUE) { echo "数据插入成功"; } else { echo "数据插入失败: " . $conn->error; } // 关闭连接 $conn->close();
// 文件路径 $filePath = "./data.csv"; // 打开文件 $file = fopen($filePath, "a"); // 写入数据 $data = array($name, $email); fputcsv($file, $data); // 关闭文件 fclose($file); echo "数据写入成功";
3. Temporary storage of data
// 开启Session session_start(); // 将表单数据存储到Session中 $_SESSION['name'] = $name; $_SESSION['email'] = $email; // 重定向到另一个页面 header("Location: welcome.php"); exit();
// 设置Cookie setcookie('name', $name, time() + 3600); // 有效期为1小时 setcookie('email', $email, time() + 3600); // 重定向到另一个页面 header("Location: welcome.php"); exit();
Conclusion:
Through the introduction of this article, we have learned how to use PHP to process form data and achieve data persistence. Storage and temporary storage. Based on actual needs, we can choose to store data in a database or file, or use Session and Cookie for temporary storage. These methods can help us better process and manage form data, improve user experience and data security.
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