使用 MySQLi 和 PDO 向 MySQL 插入数据

1、(MySQLi - 面向对象)

<?php
header("Content-type:text/html;charset=utf-8");

$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "myDB";
 // 创建连接
$conn = new mysqli($servername,$username, $password, $dbname);
// 检测连接
if ($conn->connect_error) {
die("连接失败: " . $conn->connect_error);
}

$sql = "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('John', 'Doe', '[email protected]')";

if ($conn->query($sql) === TRUE) {
echo "新记录插入成功";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}

 $conn->close();
?>

2、(MySQLi - 面向过程)

<?php
header("Content-type:text/html;charset=utf-8");

 $servername = "localhost";
$username = "root";
$password = "root";
$dbname = "myDB";

 // 创建连接
  $conn = mysqli_connect($servername, $username, $password, $dbname);
// 检测连接
 if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
  }

    $sql = "INSERT INTO MyGuests2 (firstname, lastname, email)
 VALUES ('John', 'Doe', '[email protected]')";

 if (mysqli_query($conn, $sql)) {
echo "新记录插入成功";
  } else {
echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}

 mysqli_close($conn);
?>

3、 (PDO)

<?php
header("Content-type:text/html;charset=utf-8");

$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "myDB";

try {
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
// 设置 PDO 错误模式，用于抛出异常
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$sql = "INSERT INTO MyGuests3 (firstname, lastname, email)
VALUES ('John', 'Doe', '[email protected]')";
// 使用 exec() ，没有结果返回
$conn->exec($sql);
echo "新记录插入成功";
}
catch(PDOException $e)
{
echo $sql . "<br>" . $e->getMessage();
}

$conn = null;
?>