使用 MySQLi 和 PDO 向 MySQL 插入數(shù)據(jù)

在創(chuàng)建完數(shù)據(jù)庫和表后,我們可以向表中添加數(shù)據(jù).

以下為一些語法規(guī)則：

• PHP 中 SQL 查詢語句必需使用引號(hào)

• 在 SQL 查詢語句中的字符串值必需加引號(hào)

• 數(shù)值的值不必要引號(hào)

• NULL 值不必要引號(hào)

INSERT INTO 語句通常用于向 MySQL 表添加新的記錄：

INSERT INTO table_name (column1, column2, column3,...)

VALUES (value1, value2, value3,...)

學(xué)習(xí)更多關(guān)于 SQL 知識(shí),請(qǐng)查看我們的 SQL 教程.

在前面的幾個(gè)章節(jié)中我們已經(jīng)創(chuàng)建了表 "MyGuests",表字段有: "id", "firstname", "lastname", "email" 和 "reg_date". 現(xiàn)在,讓我們開始向表填充數(shù)據(jù).

以下實(shí)例向 "MyGuests" 表添加了新的記錄:

實(shí)例 (MySQLi - 面向?qū)ο?

<?php

$servername = "localhost";

$username = "username";

$password = "password";

$dbname = "myDB";

// 創(chuàng)建連接

$conn = new mysqli($servername, $username, $password, $dbname);

// 檢測(cè)連接

if ($conn->connect_error) {

die("連接失敗: " . $conn->connect_error);

}

$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;

}

$conn->close();

?>

實(shí)例 (MySQLi - 面向過程)

<?php

$servername = "localhost";

$username = "username";

$password = "password";

$dbname = "myDB";

// 創(chuàng)建連接

$conn = mysqli_connect($servername, $username, $password, $dbname);

// 檢測(cè)連接

if (!$conn) {

die("Connection failed: " . mysqli_connect_error());

}

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

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

if (mysqli_query($conn, $sql)) {

echo "新記錄插入成功";

} else {

echo "Error: " . $sql . "<br>" . mysqli_error($conn);

}

mysqli_close($conn);

?>

實(shí)例 (PDO)

<?php

$servername = "localhost";

$username = "username";

$password = "password";

$dbname = "myDBPDO";

try {

$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);

// 設(shè)置 PDO 錯(cuò)誤模式,用于拋出異常

$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

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

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

// 使用 exec() ,沒有結(jié)果返回

$conn->exec($sql);

echo "新記錄插入成功";

}

catch(PDOException $e)

{

echo $sql . "<br>" . $e->getMessage();

}

$conn = null;

?>