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‘, ‘[email protected]‘)";
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‘, ‘[email protected]‘);";
$sql .= "INSERT INTO
MyGuests (firstname, lastname, email)
VALUES (‘Mary‘, ‘Moe‘, ‘[email protected]‘);";
$sql .= "INSERT INTO
MyGuests (firstname, lastname, email)
VALUES (‘Julie‘, ‘Dooley‘, ‘[email protected]‘)";
if ($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 = "[email protected]";$stmt->execute();
$firstname
= "Mary";$lastname = "Moe";$email = "[email protected]";$stmt->execute();
$firstname = "Julie";$lastname = "Dooley";$email = "[email protected]";
$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
$servername = "localhost";
$username = "username";
$password = "password";
try {
$conn = new PDO("mysql:host=$servername;dbname=myDB", $username, $password);
// 设置 PDO 错误模式为异常
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$sql = "CREATE DATABASE myDBPDO";
// 使用 exec() ，因为没有结果返回
$conn->exec($sql);
echo "数据库创建成功<br>";
// 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
)";
// 使用 exec() ，没有结果返回
$conn->exec($sql);
echo "数据表 MyGuests 创建成功";
//插入数据
$sql = "INSERT INTO MyGuests (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";
//插入多条数据
// 开始事务
$conn->beginTransaction();
// SQL 语句
$conn->exec("INSERT INTO MyGuests (firstname, lastname, email)
VALUES (‘John‘, ‘Doe‘, ‘[email protected]‘)");
$conn->exec("INSERT INTO MyGuests (firstname, lastname, email)
VALUES (‘Mary‘, ‘Moe‘, ‘[email protected]‘)");
$conn->exec("INSERT INTO MyGuests (firstname, lastname, email)
VALUES (‘Julie‘, ‘Dooley‘, ‘[email protected]‘)");
// 提交事务
$conn->commit();
echo "新记录插入成功";
// 预处理 SQL 并绑定参数
$stmt = $conn->prepare("INSERT INTO MyGuests (firstname, lastname, email)
VALUES (:firstname, :lastname, :email)");
$stmt->bindParam(‘:firstname‘, $firstname);
$stmt->bindParam(‘:lastname‘,
$lastname);
$stmt->bindParam(‘:email‘, $email);
// 插入行
$firstname =
"John";
$lastname = "Doe";
$email = "[email protected]";
$stmt->execute();
// 插入其他行
$firstname = "Mary";
$lastname = "Moe";
$email = "[email protected]";
$stmt->execute();
// 插入其他行
$firstname = "Julie";
$lastname = "Dooley";
$email = "[email protected]";
$stmt->execute();
echo "新记录插入成功";
//查询数据
$stmt = $conn->prepare("SELECT * FROM MyGuests");
$stmt->execute();
// 设置结果集为关联数组
$result = $stmt->setFetchMode(PDO::FETCH_ASSOC);
foreach(new TableRows(new RecursiveArrayIterator($stmt->fetchAll())) as
$k=>$v) {
echo $v;
}
$stmt = null;
}
catch(PDOException $e)
{
echo $sql . "<br>" . $e->getMessage();
}
$conn = null;
?>