PHP mysqli_connect连接

时间：2025-03-24 11:47:11

1、首先在mysql命令控制台新建数据库

mysql> create database test;
Query OK, 1 row affected (0.04 sec)

mysql> use test;
Database changed

mysql> create table test_table(
    -> id int(5) auto_increment primary key,
    -> user char(10),
    -> pass char(10),
    -> text char(10),
    -> sex char(1),
    -> connect char(10));
Query OK, 0 rows affected (0.21 sec)

mysql>

2、登录注册代码

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>登录</title>
</head>
<body>
    <div>
        <b>登录</b>
        <form action="" method="post">
            <p><span>用户名：</span><input type="text" name="user" required="" /></p>
            <p><span>密码：</span><input type="password" name="pass"/ required=""></p>
            <p><input type="reset" name=""/> <input type="submit" name=""/></p>
        </form>
        <a href="">新用户注册</a>
    </div>
</body>
</html>


<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>注册</title>
</head>
<body>
    <div>
        <b>注册</b>
        <form action="" method="post">
            <p><span>用户名：</span><input type="text" name="user" required=""/></p>
            <p><span>密码：</span><input type="password" name="pass" required=""/></p>
            <p><span>性别：</span>
            <input type="radio" name="sex" checked="checked" value="男"/>男
            <input type="radio"  name="sex" value="女"/>女
            </p>
            <p><span>联系：</span><input type="text" name="connect" value="" required=""/></p>
            <p><span>文本：</span><input type="text" name="text" required=""/></p>

            <p>
                <input type="reset" name=""/> <input type="submit" name=""/>
            </p>
        </form>
        <a href="">已注册</a>
    </div>
</body>
</html>


<meta charset="utf-8">
<?php
    $conn = mysqli_connect('localhost','root','','test') or die('数据库连接失败');
    $conn->query("SET NAMES 'UTF8'");

    $user = $_POST['user'];
    $pass = $_POST['pass'];
    $sql="SELECT * FROM test_table where user='$user' and pass='$pass'"; 

    $rs=$conn->query($sql);
    $row = $rs-> fetch_array(); 
    // var_dump($row);

    if($row['user']==$user&& $row['pass']==$pass){
        echo $row['user']."登陆成功!";
    }
    else{
        echo"登录失败，请重新登录！";
    }
?>

<?php
    header ( "Content-type:text/html;charset=utf-8" );
    $conn = mysqli_connect('localhost','root','','test') or die('数据库连接失败');
    $conn->query("SET NAMES 'UTF8'");

    $user = $_POST['user'];
    $pass = $_POST['pass'];
    $sex = $_POST['sex'];
    $connect = $_POST['connect'];
    $text = $_POST['text'];

    $sql = "INSERT INTO test_table VALUES ('','{$user}' ,'{$pass}','{$text}','{$sex}' ,'{$connect}' )";

    $result = $conn->query($sql);
            
    // if ($result > 0) {
    //     echo "<script> alert('注册成功，返回登录页面');
    //                     =''; //跳转到注册页
    //          </script>";
    // } else {
    //     echo "<script> alert('注册失败，返回注册页面');
    //                     (); //返回上一页
    //          </script>";
    // }
    echo("注册成功！！！<br/><a href=''>点击登录</a>")
?>

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