PHP MySQL Insert data

Use MySQLi and PDO to insert data into MySQL

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

The following three writing methods can all insert data

INSERT INTO tbl_name VALUES (value1, value2, ...);
INSERT INTO tbl_name (column1, column2, ...) VALUES (value1, value2, ...);
INSERT INTO tbl_name SET column1 = value1, column2 = value2;

Note: In the first writing method, pay attention to the number. The number of values ??must be consistent with the number of fields. For example, there are 4 in the table Fields, there must be four values ??in parentheses; therefore, it is recommended to use the second way of writing

字 字 字 字 字 字:

· PHP in the SQL query statement must be used for quotation marks

#·???????? String values ??in SQL query statements must be quoted

·????? Numeric values ??do not need quotes

·?????????????????????????????????????????????????????? ??? out out‐‐‐‐‐‐‐‐through‐through‐out‐out‐quotes to the INSERT statement. Usually used to add new records to a MySQL table:

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

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 do not need to specify the value in the SQL query statement ; MySQL will automatically add a value to 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";
 // 創(chuàng)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);
 } 
 $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();
 ?>

Example ( MySQLi - Procedure-oriented)

<?php
 $servername = "localhost";
 $username = "username";
 $password = "password";
 $dbname = "myDB";
 
 // 創(chuàng)建連接
 $conn = mysqli_connect($servername, $username, $password, $dbname);
 // 檢測連接
 if (!$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);
 ?>

Instance(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;
 ?>