注意:1.用两台电脑测试了一下,php的版本随意,但mysql的版本为5.53最好(我用其他版本连接不了数据库,你们可以测试一下其他的版本)。
2.mysql服务器的密码默认为root,我这里是root@123。
3.创建数据库:数据库名为test,表单名为user(注意id一栏需要勾选A_I选项)
先搭建环境,这里推荐phpstudy集成环境,安装完成后启动相应服务即可。
phpstudy官网
1.index.html(登陆界面)
2.login.php(登录后端)
3.register.html(注册前面)
4.register.php(注册后端)
1.登录界面:
源码:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>登录</title>
</head>
<body>
<div>
<b>登录</b>
<form action="login.php" method="post"><!--表单-->
<p><span>用户名: </span><input type="text" name="user" required=""></p><!--required确保信息不能为空-->
<p><span>密码:</span><input type="text" name="pass" required=""></p>
<p><input type="reset" name=""/><input type="submit" name="" value="登录" /></p>
</form>
<a href="register.html">新用户注册</a>
</div>
</body>
</html>
2.登录后端
随便输入的账号密码,登录失败。
源码:
<?php
echo "...<br>";
header("Content-Type:text/html;charset=utf-8");
echo "0<br>";
$conn = mysqli_connect('localhost' , 'root' , 'root@123w' , 'test') or die("连接失败");
echo "*";
$conn->query("SET NAMES 'utf-8'");
echo "**";
$user = $_POST['user'];
$pass = $_POST['pass'];
$sql="SELECT * FROM user where username='$user' and password='$pass'";
echo ")";
$retval = mysqli_query($conn , $sql);
if(!$retval)
{
die("cannot<br>");
}
$result=$conn->query($sql);
$data = mysqli_fetch_all($result);
// var_dump($row);
echo "(<br>";
if($data[0][1]==$user&& $data[0][2]==$pass){
echo $row['user']."登陆成功!";
}
else{
echo"登录失败,请重新登录!";
}
/* $sql = "SELECT * FROM user where user='{$user}' and pass='{$pass}'";
$result=$conn->query($sql);
$data = mysqli_fetch_all($result);
if($row['user']==$user && $row['pass']==$pass)
{
echo $row['user']."登陆成功";
}
else
{
echo "登录失败";
}*/
?>
注册前端:
源码:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>新用户注册</title>
</head>
<body>
<div>
<form action="register.php" method="post">
<p><span>用户名:<input type="text" name="user" required=""></span></p>
<p><span>密码:<input type="text" name="pass" required=""></span></p>
<p><span>联系:<input type="text" name="connect" required=""></span></p>
<input type="reset" name=""><input type="submit" name="Submit" value="注册">
</form>
<a href="index.html">已注册</a>>
</div>
</body>
</html>
注册后端:
注册成功后可以返回登陆界面(3456为测试语句的输出)
源码:
<?php
header("Content-type:text/html;charset=utf-8");
echo '3<br>';
$conn = mysqli_connect('localhost' , 'root' , 'root@123w');
if(!conn)
{
die("连接失败" . mysqli_error($conn));
}
echo '4<br>';
mysqli_select_db($conn , 'test');
$user = $_POST['user'];
$pass = $_PASS['pass'];
$sql = "INSERT INTO user values(NULL , '{$user}' , '{$pass}' , '{$connect}')";
$retval = mysqli_query($conn , $sql);
echo '5<br>';
/*if(!$retvql)
{
die("cannot insert " . mysqli_error($conn));
}*/
echo '6<br>';
mysqli_close($conn);
echo ("success<br/><a href='index.html'>登录</a>");
?>