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PHP MySQL 插入数据

时间:14-12-10 18:03:27点击:276

使用 MySQLi 和 PDO 向 MySQL 插入数据

在创建完数据库和表后,我们可以向表中添加数据。

以下为一些语法规则:

PHP 中 SQL 查询语句必须使用引号

在 SQL 查询语句中的字符串值必须加引号

数值的值不需要引号

NULL 值不需要引号

INSERT INTO 语句通常用于向 MySQL 表添加新的记录:

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

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

在前面的几个章节中我们已经创建了表 "MyGuests",表字段有: "id", "firstname", "lastname", "email" 和 "reg_date"。 现在,让我们开始向表填充数据。

Note

注意: 如果列设置 AUTO_INCREMENT (如 "id" 列) 或 TIMESTAMP (如 "reg_date" 列),,我们就不需要在 SQL 查询语句中指定值; MySQL 会自动为该列添加值。

以下实例向 "MyGuests" 表添加了新的记录:

实例 (MySQLi - 面向对象)

<?php

$$servername = "localhost";

$$username = "username";

$$password = "password";

$$dbname = "myDB";

// 创建连接

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

// 检测连接

if ($$conn->connect_error) {

die("Connection failed: " . $$conn->connect_error);

}

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

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

if ($$conn->query($$sql) === TRUE) {

echo "New record created successfully";

} else {

echo "Error: " . $$sql . "<br>" . $$conn->error;

}

$$conn->close();

?>

实例 (MySQLi - 面向过程)

<?php

$$servername = "localhost";

$$username = "username";

$$password = "password";

$$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 MyGuests (firstname, lastname, email)

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

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

echo "New record created successfully";

} else {

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

}

mysqli_close($$conn);

?>

实例 (PDO)

<?php

$$servername = "localhost";

$$username = "username";

$$password = "password";

$$dbname = "myDBPDO";

try {

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

// set the PDO error mode to exception

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

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

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

// use exec() because no results are returned

$$conn->exec($$sql);

echo "New record created successfully";

}

catch(PDOException $$e)

{

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

}

$$conn = null;

?>