用的是html和php的混合代码，适用于初学者，了解前后端简单的逻辑
<form method="post" class="zhuce" action="mysql4.php">
<div class="name">
用户名：<input type="text" name="uname">
</div>
<div class="name">
密码：<input type="password" name="upwd">
</div>
<input type="submit" value="登录">
</form>
<?php //创建用户表数据库
//$servername = "localhost";
//$username = "root";
//$password = "123456";
//
创建连接
//$conn = new mysqli($servername, $username, $password);
检测连接
//if ($conn->connect_error) {
// die("连接失败: " . $conn->connect_error);
//}
//
创建数据库
//$sql = "CREATE DATABASE YongHuBiao";
//if ($conn->query($sql) === TRUE) {
// echo "数据库创建成功";
//} else {
// echo "Error creating database: " . $conn->error;
//}
//
//$conn->close();
?>
<?php //创建用户表
//$servername = "localhost";
//$username = "root";
//$password = "123456";
//$dbname = "YongHuBiao";
//
创建连接
//$conn = mysqli_connect($servername, $username, $password, $dbname);
检测连接
//if (!$conn) {
// die("连接失败: " . mysqli_connect_error());
//}
//
使用 sql 创建数据表
//$sql = "CREATE TABLE yonghubiao (
//firstname VARCHAR(11) NOT NULL PRIMARY KEY,
//password varchar(20) not null
//)";
//
//if (mysqli_query($conn, $sql)) {
// echo "数据表 yonghubiao 创建成功";
//} else {
// echo "创建数据表错误: " . mysqli_error($conn);
//}
//
//mysqli_close($conn);
?>
<?php //利用变量向数据库插入数据（预处理操作）
//$servername = "localhost";
//$username = "root";
//$password = "123456";
//$dbname = "YongHuBiao";
//
创建连接
//$conn = new mysqli($servername, $username, $password, $dbname);
//
检测连接
//if ($conn->connect_error) {
// die("连接失败: " . $conn->connect_error);
//}
//
预处理及绑定
//$stmt = $conn->prepare("INSERT INTO yonghubiao (uname, password) VALUES (?, ?)");
//$stmt->bind_param("ss", $uname, $password);
//
设置参数并执行
//$uname = "13132255598";
//$password = "john@example.com";
//$stmt->execute();
//
//$uname = "13135555668";
//$password = "jasdsadple.com";
//$stmt->execute();
//
//$uname = "13135557798";
//$password = "sdafdfcce.com";
//$stmt->execute();
//echo "新记录插入成功";
//
//$stmt->close();
//$conn->close();
?>
<?php
$servername = "localhost";
$username = "root";
$password = "123456";
$dbname = "YongHuBiao";
// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);
// 检测连接
if ($conn->connect_error) {
die("连接失败: " . $conn->connect_error);
}
// 预处理及绑定
$stmt = $conn->prepare("INSERT INTO yonghubiao (uname, password) VALUES (?, ?)");
$stmt->bind_param("ss", $uname, $password);
// 设置参数并执行
$uname = $_POST["uname"];
$password = $_POST["upwd"];
$stmt->execute();
$stmt->close();
$conn->close();
echo "新记录插入成功666";
?>
最后的echo那个语句不知道该怎么让它在数据提交后才显示
