PHP MySQL 插入数据
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。
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;
?>