php ，MySQL操作的兩種方式

本文轉載自查看原文 2016-08-03 19:05 4253 操作/ 異常處理/ 連接/ MySQL/ php/ 插入

本文省略php對MySQL的面向過程的操作方式，介紹最常用的，面向對象的操作方式和PDO方式

面向對象的操作方式：

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

// 創建連接
$conn = new mysqli($servername, $username, $password);

// 確定數據庫，創建連接
//$conn = new mysqli($servername, $username, $password, $dbname);
// 檢測連接
if ($conn->connect_error) {
    die("連接失敗: " . $conn->connect_error);
}

// 創建數據庫
$sql = "CREATE DATABASE myDB";
if ($conn->query($sql) === TRUE) {
    echo "數據庫創建成功";
} else {
    echo "Error creating database: " . $conn->error;
}

//選擇數據庫

mysql_select_db( 'MyDB' );

// 使用 sql 創建數據表
 $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 "創建數據表錯誤: " . $conn->error;
}

//插入數據
$sql = "INSERT INTO MyGuests (firstname, lastname, email)
 VALUES ('John', 'Doe', 'john@example.com')";
 
if ($conn->query($sql) === TRUE) {
    echo "新記錄插入成功";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}
//插入多條數據
$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 "新記錄插入成功";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}


// 預處理及綁定
$stmt = $conn->prepare("INSERT INTO MyGuests (firstname, lastname, email) VALUES(?, ?, ?)");
$stmt->bind_param("sss", $firstname, $lastname, $email);

// 設置參數並執行
$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 "新記錄插入成功";

$stmt->close();


//讀取數據
$sql = "SELECT id, firstname, lastname FROM MyGuests";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // 輸出每行數據
    while($row = $result->fetch_assoc()) {
        echo "<br> id: ". $row["id"]. " - Name: ". $row["firstname"]. " " . $row["lastname"];
    }
} else {
    echo "0 個結果";
}

$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);

    // 設置 PDO 錯誤模式為異常
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $sql = "CREATE DATABASE myDBPDO";

    // 使用 exec() ，因為沒有結果返回
    $conn->exec($sql);

    echo "數據庫創建成功<br>";

　　    // 使用 sql 創建數據表
    $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() ，沒有結果返回
    $conn->exec($sql);
    echo "數據表 MyGuests 創建成功";

//插入數據

    $sql = "INSERT INTO MyGuests (firstname, lastname, email)
    VALUES ('John', 'Doe', 'john@example.com')";
    // 使用 exec() ，沒有結果返回
    $conn->exec($sql);
    echo "新記錄插入成功";

//插入多條數據

    // 開始事務
    $conn->beginTransaction();
    // SQL 語句
    $conn->exec("INSERT INTO MyGuests (firstname, lastname, email)
    VALUES ('John', 'Doe', 'john@example.com')");
    $conn->exec("INSERT INTO MyGuests (firstname, lastname, email)
    VALUES ('Mary', 'Moe', 'mary@example.com')");
    $conn->exec("INSERT INTO MyGuests (firstname, lastname, email)
    VALUES ('Julie', 'Dooley', 'julie@example.com')");

    // 提交事務
    $conn->commit();
    echo "新記錄插入成功";

// 預處理 SQL 並綁定參數
    $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 = "john@example.com";
    $stmt->execute();

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

    // 插入其他行
    $firstname = "Julie";
    $lastname = "Dooley";
    $email = "julie@example.com";
    $stmt->execute();

    echo "新記錄插入成功";

//查詢數據

$stmt = $conn->prepare("SELECT * FROM MyGuests");
    $stmt->execute();

    // 設置結果集為關聯數組
    $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;
?>

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