php ，MySQL操作的两种方式

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本文省略php对MySQL的面向过程的操作方式，介绍最常用的，面向对象的操作方式和PDO方式

面向对象的操作方式：

<?php
$servername = "localhost";
$username = "username";
$password = "password";

// 创建连接
$conn = new mysqli($servername, $username, $password);

// 确定数据库，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);
}

// 创建数据库
$sql = "CREATE DATABASE myDB";
if ($conn->query($sql) === TRUE) {
    echo "数据库创建成功";
} else {
    echo "Error creating database: " . $conn->error;
}

//选择数据库

mysql_select_db( ‘MyDB‘ );

// 使用 sql 创建数据表

	$sql 
	= "CREATE TABLE MyGuests (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY 
	KEY, 
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
email 
	VARCHAR(50),
reg_date TIMESTAMP
)";

	
if ($conn->query($sql) === TRUE) {
    echo "Table 
	MyGuests created successfully";
} else {
    echo 
	"创建数据表错误: " . $conn->error;
}

//插入数据
$sql = "INSERT INTO MyGuests (firstname, lastname, email)

	VALUES (‘John‘, ‘Doe‘, ‘john@example.com‘)";

	
if ($conn->query($sql) === TRUE) {
    echo "新记录插入成功";
} else {
    echo 
	"Error: " . $sql . "<br>" . $conn->error;
}
//插入多条数据
$sql = "INSERT INTO MyGuests (firstname, lastname, email)

	VALUES (‘John‘, ‘Doe‘, ‘john@example.com‘);";

	$sql .= "INSERT INTO 
	MyGuests (firstname, lastname, email)

	VALUES (‘Mary‘, ‘Moe‘, ‘mary@example.com‘);";

	$sql .= "INSERT INTO 
	MyGuests (firstname, lastname, email)

	VALUES (‘Julie‘, ‘Dooley‘, ‘julie@example.com‘)";

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


// 预处理及绑定
$stmt = $conn->prepare("INSERT INTO MyGuests (firstname, lastname, email) 
	VALUES(?, ?, ?)");
$stmt->bind_param("sss", $firstname, $lastname, 
	$email);

// 设置参数并执行
$firstname = "John";
$lastname 
	= "Doe";
$email = "john@example.com";
$stmt->execute();

$firstname 
	= "Mary";
$lastname = "Moe";
$email = "mary@example.com";
$stmt->execute();

	
$firstname = "Julie";
$lastname = "Dooley";
$email = "julie@example.com";

	$stmt->execute();

echo "新记录插入成功";

$stmt->close();


//读取数据
$sql = "SELECT id, firstname, lastname FROM MyGuests";
$result 
	= $conn->query($sql);

if ($result->num_rows > 0) {
    
	// 输出每行数据
    while($row = $result->fetch_assoc()) 
	{
        echo "<br> id: ". 
	$row["id"]. " - Name: ". $row["firstname"]. " " . $row["lastname"];
    
	}
} else {
    echo "0 个结果";
}

$conn->close();
?>

使用pdo方式

php ，MySQL操作的两种方式

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原文地址：http://www.cnblogs.com/hanzezhong/p/5734116.html