PHP mysqli 预处理

创建数据库test和对应的表test，通过预处理向test表中插入多条数据。
代码如下：

<?php
    //  使用预处理操作数据库
    $dbServer = "localhost:3306";
    $dbUser = "root";
    $dbPass = "";
    $dbName = "test";

    //  创建连接
    $conn = new mysqli($dbServer, $dbUser, $dbPass, $dbName);
    if ($conn->connect_error)
        die("连接失败：" . $conn->connect_error);
    else
        echo "连接成功！<br>";

    //  创建表
    $sql = "CREATE TABLE test (
        id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
        firstname VARCHAR(30) NOT NULL,
        lastname VARCHAR(30) NOT NULL,
        age int(8) UNSIGNED NOT NULL,
        email VARCHAR(50)
        )";

    if ($conn->query($sql) == TRUE)
        echo "数据表创建成功。<br>";
    else
        echo "数据表创建失败：" . $conn->error . "<br>";

    //  创建预处理对象
    $sql = "INSERT INTO test (firstname, lastname, age, email) VALUES (?, ?, ?, ?)";
    $info = array(1 => array('firstname'=>'kobe', 'lastname'=>'bryant', 'age'=>30, 'email'=>"kobe@qq.com"),
            2 => array('firstname'=>'yao', 'lastname'=>'ming', 'age'=>20, 'email'=>"yao@qq.com"));
    $stmt = $conn->prepare($sql) or die($conn->error);
    foreach ($info as $num => $value) {
        //  参数绑定:   ssis代表，第一个、第二个、第三个参数是string类型，第四个参数是int类型
        $stmt->bind_param('ssis', $value['firstname'], $value['lastname'], $value['age'], $value['email']);
        if (!$stmt->execute())
            die("插入失败：" . $conn->error . "<br>");
    }
    echo "插入成功<br>";
    $stmt->close();

    $sql = "SELECT * FROM test";
    $result = $conn->query($sql);
    if ($result->num_rows > 0){
        //  输出每行数据
        echo "查询结果 : <br>";
        while($row = $result->fetch_assoc()){
            echo "id: " . $row["id"] . " ; firstname: " . $row["firstname"] . " ; lastname : "
            . $row["lastname"] . " ; age : " . $row["age"] . " ; email : " . $row["email"] . "<br>";
        }
    }
    else
        echo "0个结果";
    //  关闭连接
    $conn->close();
?>

运行结果如下：