How to insert data via PHP MySQL

Using MySQLi and PDO to insert data into MySQL

After creating the database and table, we can add data to the table.

The following are some grammar rules:

SQL query statements in PHP must use quotation marks

String values ​​in SQL query statements must be quoted

Numeric values ​​do not require quotes

NULL values ​​do not require quotes

The INSERT INTO statement is usually used to add new records to a MySQL table:

INSERT INTO table_name (column1, column2 , column3,...)
VALUES (value1, value2, value3,...)

To learn more about SQL, check out our SQL tutorial.

In the previous chapters we have created the table "MyGuests", the table fields are: "id", "firstname", "lastname", "email" and "reg_date". Now, let's start filling the table with data.

Note: If the column is set to AUTO_INCREMENT (such as the "id" column) or TIMESTAMP (such as the "reg_date" column), we will There is no need to specify the value in the SQL query; MySQL automatically adds the value for the column.

The following example adds a new record to the "MyGuests" table:

Example (MySQLi - Object-oriented)

<?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("连接失败: " . $conn->connect_error);
} 
$sql = "INSERT INTO MyGuests (firstname, lastname, email)
VALUES (&#39;John&#39;, &#39;Doe&#39;, &#39;john@example.com&#39;)";
if ($conn->query($sql) === TRUE) {
    echo "新记录插入成功";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}
$conn->close();
?>

Example (MySQLi - process-oriented)

<?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());
}
$sql = "INSERT INTO MyGuests (firstname, lastname, email)
VALUES (&#39;John&#39;, &#39;Doe&#39;, &#39;john@example.com&#39;)";
if (mysqli_query($conn, $sql)) {
    echo "新记录插入成功";
} else {
    echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}
mysqli_close($conn);
?>

Example (PDO)

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDBPDO";
try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    // 设置 PDO 错误模式，用于抛出异常
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $sql = "INSERT INTO MyGuests (firstname, lastname, email)
    VALUES (&#39;John&#39;, &#39;Doe&#39;, &#39;john@example.com&#39;)";
    // 使用 exec() ，没有结果返回 
    $conn->exec($sql);
    echo "新记录插入成功";
}
catch(PDOException $e)
{
    echo $sql . "<br>" . $e->getMessage();
}
$conn = null;
?>

This article explains in detail the operation of inserting data through php. For more learning materials, please pay attention to php You can watch it on the Chinese website.

Related recommendations:

How to create a MySQL table through PHP

How to create a database through PHP MySQL

PHP knowledge and operations related to connecting to MySQL

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