数据库课程设计 PHP web实现

纪念一下自己写的东西.. 都说很垃圾就是了

直接用XAMPP做的 菜鸟网上学的PHP和HTML

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>学生信息</title>
</head>

<style>
body {
    background: rgba(12, 100, 129, 1) url('https://images2018.cnblogs.com/blog/1393985/201806/1393985-20180613124043614-112674236.jpg') fixed no-repeat;
    background-position: 50% 5%;
    background-size: cover;
}
</style>

<body>
    <center>
    <br><br>
    <h2>学生信息管理</h2>
    <a href="myindex.php">浏览学生</a>
    <a href="login.php">增删学生</a>
    <hr>
    <br><br><br><br><br>
        <form action="search.php" method="post">
            <input type="text" name = "fname"><br>
            <input type="radio" name = "vehicle" value="name">姓名<br>
            <input type="radio" name = "vehicle" value="num" checked="checked">学号<br>
            <input type="radio" name = "vehicle" value="course" checked="checked">课程<br>
            <input type="submit" value = "搜索">
        </form>
    </center>
    <br><br><br><br><br><br><br><br><br><br><br><br><br>
</body>
</html>
test1
<!DOCTYPE html>
<head>
    <meta charset = "UTF-8">
    <title>学生信息管理</title>
</head>

<style>
body {
    background: rgba(12, 100, 129, 1) url('https://images2018.cnblogs.com/blog/1393985/201806/1393985-20180613124043614-112674236.jpg') fixed no-repeat;
    background-position: 50% 5%;
    background-size: cover;
}
</style>

<body>
<center>
    <h3>浏览学生信息<h3>
    <table width = "800" border = "1">
        <tr>
            <th>学号</th>
            <th>姓名</th>
            <th>课程1</th>
            <th>课程2</th>
            <th>课程3</th>
            <th>课程4</th>
            <th>课程5</th>
        </tr>
        <?php
        $dbhost = "localhost:3306";
        $dbuser = "root";
        $dbpass = "";

        $conn = mysqli_connect($dbhost, $dbuser, $dbpass);
        if(!$conn)
        {
            die('Could not connect: ' . mysqli_error());
        }
        mysqli_query($conn , "set names utf8");
        mysqli_select_db($conn, 'demo');

        $sql = "SELECT * FROM stu";
        $retval = mysqli_query($conn, $sql);

        while($row = mysqli_fetch_array($retval, MYSQLI_ASSOC))
        {
            echo "<tr>";
            echo "<td>{$row['学号']}</td> ";
            echo "<td>{$row['姓名']}</td> ";
            echo "<td>{$row['课程1']} </td> ";
            echo "<td>{$row['课程2']} </td> ";
            echo "<td>{$row['课程3']} </td> ";
            echo "<td>{$row['课程4']} </td> ";
            echo "<td>{$row['课程5']} </td> ";
            echo "</tr>";
        }

        ?>
    </table>
</center>
<h3>
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<a href="test1.php">返回首页</a>
</h3>
</body>
</html>
myindex
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>课程查询</title>
</head>

<style>
body {
    background: rgba(12, 100, 129, 1) url('https://images2018.cnblogs.com/blog/1393985/201806/1393985-20180613124043614-112674236.jpg') fixed no-repeat;
    background-position: 50% 5%;
    background-size: cover;
}
</style>


<body>
    <center>
        <?php
        $dbhost = "localhost:3306";
        $dbuser = "root";
        $dbpass = "";

        $conn = mysqli_connect($dbhost, $dbuser, $dbpass);
        if(!$conn)
        {
            die('Could not connect: ' . mysqli_error());
        }
        mysqli_query($conn , "set names utf8");
        mysqli_select_db($conn, 'demo');

        $sqlll = $_POST["fname"];
        $sqlcheck = $_POST["vehicle"];

        echo "<br><br><br><br><br><br><br><br><br><br><br><br><br>";
        if($sqlcheck === 'course')
        {
            echo "<table width = '400' border = '2'>";
            echo "<tr>";
            echo "<th>学号</th>";
            echo "<th>姓名</th>";
            echo "</tr>";

            $sql = "SELECT `学号`, `姓名`, `课程1`, `课程2`, `课程3`, `课程4`, `课程5` FROM `stu` WHERE `课程1` LIKE '$sqlll'";
            $retval = mysqli_query($conn, $sql);
            while($row = mysqli_fetch_array($retval, MYSQLI_ASSOC))
            {
                echo "<tr>";
                echo "<td>{$row['学号']}</td> ";
                echo "<td>{$row['姓名']}</td> ";
                echo "</tr>";
            }

            $sql = "SELECT `学号`, `姓名`, `课程1`, `课程2`, `课程3`, `课程4`, `课程5` FROM `stu` WHERE `课程2` LIKE '$sqlll'";
            $retval = mysqli_query($conn, $sql);
            while($row = mysqli_fetch_array($retval, MYSQLI_ASSOC))
            {
                echo "<tr>";
                echo "<td>{$row['学号']}</td> ";
                echo "<td>{$row['姓名']}</td> ";
                echo "</tr>";
            }

            $sql = "SELECT `学号`, `姓名`, `课程1`, `课程2`, `课程3`, `课程4`, `课程5` FROM `stu` WHERE `课程3` LIKE '$sqlll'";
            $retval = mysqli_query($conn, $sql);
            while($row = mysqli_fetch_array($retval, MYSQLI_ASSOC))
            {
                echo "<tr>";
                echo "<td>{$row['学号']}</td> ";
                echo "<td>{$row['姓名']}</td> ";
                echo "</tr>";
            }

            $sql = "SELECT `学号`, `姓名`, `课程1`, `课程2`, `课程3`, `课程4`, `课程5` FROM `stu` WHERE `课程4` LIKE '$sqlll'";
            $retval = mysqli_query($conn, $sql);
            while($row = mysqli_fetch_array($retval, MYSQLI_ASSOC))
            {
                echo "<tr>";
                echo "<td>{$row['学号']}</td> ";
                echo "<td>{$row['姓名']}</td> ";
                echo "</tr>";
            }

            $sql = "SELECT `学号`, `姓名`, `课程1`, `课程2`, `课程3`, `课程4`, `课程5` FROM `stu` WHERE `课程5` LIKE '$sqlll'";
            $retval = mysqli_query($conn, $sql);
            while($row = mysqli_fetch_array($retval, MYSQLI_ASSOC))
            {
                echo "<tr>";
                echo "<td>{$row['学号']}</td> ";
                echo "<td>{$row['姓名']}</td> ";
                echo "</tr>";
            }
            echo "</table>";
        }
        else {
            if($sqlcheck === 'name') {$sql = "SELECT * FROM `stu` WHERE `姓名` LIKE '$sqlll'";}
            else {$sql = "SELECT * FROM `stu` WHERE `学号` LIKE '$sqlll'";}


            echo "<table width = '800' border = '1'>";
            echo "<tr>";
            echo "<th>学号</th>";
            echo "<th>姓名</th>";
            echo "<th>课程1</th>";
            echo "<th>课程2</th>";
            echo "<th>课程3</th>";
            echo "<th>课程4</th>";
            echo "<th>课程5</th>";


            $retval = mysqli_query($conn, $sql);
            while($row = mysqli_fetch_array($retval, MYSQLI_ASSOC))
            {
                echo "<tr>";
                echo "<td>{$row['学号']}</td> ";
                echo "<td>{$row['姓名']}</td> ";
                echo "<td>{$row['课程1']} </td> ";
                echo "<td>{$row['课程2']} </td> ";
                echo "<td>{$row['课程3']} </td> ";
                echo "<td>{$row['课程4']} </td> ";
                echo "<td>{$row['课程5']} </td> ";
                echo "</tr>";
            }
            echo "</table>";
        }

        ?>
    </center>
    <h3>
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    &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
    <a href="test1.php">返回首页</a>
    </h3>
</body>
</html>
search
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>添加学生</title>
</head>

<style>
body {
    background: rgba(12, 100, 129, 1) url('https://images2018.cnblogs.com/blog/1393985/201806/1393985-20180613124043614-112674236.jpg') fixed no-repeat;
    background-position: 50% 5%;
    background-size: cover;
}
</style>

<body>
    <?php
    $use = $_POST["user"];
    $pass = $_POST["password"];

    echo "<br><br><br><br><br><br><br><br><br><br>";
    echo "<center>";
    if($use === "admin" && $pass == "123")
    {
        echo "<h1>Welcome, lwq</h1>";
        echo "<br>";

        echo "<form action='addaction.php' method='post'>";
        echo "<input type='text' name = 's1'>学号<br>";
        echo "<input type='text' name = 's2'>姓名<br>";
        echo "<input type='text' name = 's3'>课程1<br>";
        echo "<input type='text' name = 's4'>课程2<br>";
        echo "<input type='text' name = 's5'>课程3<br>";
        echo "<input type='text' name = 's6'>课程4<br>";
        echo "<input type='text' name = 's7'>课程5<br>";
        echo "<input type='submit' value = '添加'>";
        echo "</form>";

        echo "<br><br><br>";
        echo "<form action='delete.php' method='post'>";
        echo "<input type='text' name = 'd1'>学号<br>";
        echo "<input type='text' name = 'd2'>姓名<br>";
        echo "<input type='submit' value = '删除'>";
        echo "</form>";
    }
    else {
        echo "sorry, assess denied!!<br>";
        header("Location:test1.php");
    }
    echo "</center>";
    ?>

    <h3>
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    <a href="test1.php">返回首页</a>
    </h3>
</body>
</html>
add
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>登陆</title>
</head>

<style>
body {
    background: rgba(12, 100, 129, 1) url('https://images2018.cnblogs.com/blog/1393985/201806/1393985-20180613124043614-112674236.jpg') fixed no-repeat;
    background-position: 50% 5%;
    background-size: cover;
}
</style>

<body>
    <br><br><br><br><br><br><br><br><br><br>
    <center>
        <form action="add.php" method="post">
            用户: <input type="text" name="user"><br>&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
            密码: <input type="password" name="password">
            <input type="submit" value = "登陆">
        </form>
    </center>
    <h3>
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    <a href="test1.php">返回首页</a>
    </h3>
</body>
</html>
login
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>添加学生</title>
</head>

<style>
body {
    background: rgba(12, 100, 129, 1) url('https://images2018.cnblogs.com/blog/1393985/201806/1393985-20180613124043614-112674236.jpg') fixed no-repeat;
    background-position: 50% 5%;
    background-size: cover;
}
</style>

<body>
    <br><br><br><br><br><br><br><br><br><br>
    <center>
    <?php
        $r1 = $_POST["s1"];
        $r2 = $_POST["s2"];
        $r3 = $_POST["s3"];
        $r4 = $_POST["s4"];
        $r5 = $_POST["s5"];
        $r6 = $_POST["s6"];
        $r7 = $_POST["s7"];

        $dbhost = "localhost:3306";
        $dbuser = "root";
        $dbpass = "";

        $conn = mysqli_connect($dbhost, $dbuser, $dbpass);
        if(!$conn)
        {
            die('Could not connect: ' . mysqli_error());
        }
        mysqli_query($conn , "set names utf8");
        mysqli_select_db($conn, 'demo');

        $sql = "INSERT INTO `stu` (`学号`, `姓名`, `课程1`, `课程2`, `课程3`, `课程4`, `课程5`) VALUES ('$r1', '$r2', '$r3', '$r4', '$r5', '$r6', '$r7');";
        $retval = mysqli_query($conn, $sql);
        echo "添加成功";
    ?>
    </center>
    <h3>
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    &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
    <a href="add.php">继续添加</a>
    <a href="test1.php">返回首页</a>
</body>
</html>
addaction
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>学生信息</title>
</head>

<style>
body {
    background: rgba(12, 100, 129, 1) url('https://images2018.cnblogs.com/blog/1393985/201806/1393985-20180613124043614-112674236.jpg') fixed no-repeat;
    background-position: 50% 5%;
    background-size: cover;
}
</style>

<body>
    <br><br><br><br><br><br><br><br><br><br>
    <center>
        <?php
            $t1 = $_POST["d1"];
            $t2 = $_POST["d2"];

            $dbhost = "localhost:3306";
            $dbuser = "root";
            $dbpass = "";

            $conn = mysqli_connect($dbhost, $dbuser, $dbpass);
            if(!$conn)
            {
                die('Could not connect: ' . mysqli_error());
            }
            mysqli_query($conn , "set names utf8");
            mysqli_select_db($conn, 'demo');

            $sql = "DELETE FROM `stu` WHERE 学号 = '$t1'";
            $retval = mysqli_query($conn, $sql);
            $sql = "DELETE FROM `stu` WHERE 姓名 = '$t2'";
            $retval = mysqli_query($conn, $sql);
            echo "删除成功";
         ?>
    </center>
    <h3>
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    &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
    <a href="test1.php">返回首页</a>
</body>
</html>
delete
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原文地址：https://www.cnblogs.com/lwqq3/p/10111922.html