PHP和MySQL实现的简单Demo

实现对输入的数据进行保存数据库的操作：

index.html:

<html lang="en">

<head>

    <meta charset="utf-8">

    <title>MySQL在PHP中的使用</title>

</head>

<body>

<h1>使用Demo</h1>

<form action="result.php" method="post">

Choose Search Type: <br/>

    <select name="searchtype">

        <option value="author">Author</option>

        <option value="title">Title</option>

        <option value="isbn">ISBN</option>

    </select>

    <br/>

    Enter Search Term: <br/>

    <input name="serachterm" type="text" size="">

    <br/><br/><br/>

    <input type="submit" name="submit" value="Search">

</form>

</body>

</html>

result.php:

<!DOCTYPE html>

<html>

<head>

    <meta charset="UTF-8">

    <meta name="viewport"

          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">

    <meta http-equiv="X-UA-Compatible" content="ie=edge">

    <title>Document</title>

</head>

<body>

<?php

$searchType = $_POST["searchtype"];

$searchTerm = $_POST["serachterm"];

if (!$searchTerm || !$searchType) {

    echo "请输入和选择" . '<br/>';

    exit;

}

// 存入数据库

// 1.连接数据库

$servername = "localhost";

$username = "root";

$password = "pengsi";

$dbname = "myDB";

// 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) . '<br/>';

    exit;

}

echo "连接成功" . '<br/>';

// 2.创建数据库

$sql = "CREATE DATABASE if Not Exists myDB";

if ($conn->query($sql) === TRUE) {

    echo "数据库创建成功" . '<br/>';

    // select database

    $conn->select_db($dbname);

    // 3.创建一个表

    // 使用 sql 创建数据表

    $sql = "CREATE TABLE if Not Exists MyGuests (

            id INT() UNSIGNED AUTO_INCREMENT PRIMARY KEY,

            searchType VARCHAR() NOT NULL,

            searchTerm VARCHAR() NOT NULL

        )";

    if ($conn->query($sql) === TRUE) {

        echo "Table MyGuests created successfully" . '<br/>';

        // 4.插入数据

        $sql = "INSERT INTO MyGuests (searchType, searchTerm)

                VALUES ('$searchType', '$searchTerm')";

        if ($conn->query($sql) === TRUE) {

            echo "新记录插入成功" . '<br/>';

        } else {

            echo "Error: " . $sql . "<br>" . $conn->error . '<br/>';

        }

        $conn->close();

    } else {

        echo "创建数据表错误: " . $conn->error . '<br/>';

    }

} else {

    echo "Error creating database: " . $conn->error . '<br/>';

}

?>

</body>

</html>

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PHP和MySQL实现的简单Demo

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