What does update mean in php

藏色散人
Release: 2023-02-28 17:44:02
Original
10689 people have browsed it

What does update mean in php

What does update mean in php?

PHP MySQL Update

UPDATE statement is used to modify data in the database table.

Update data in the database

The UPDATE statement is used to update existing records in the database table.

Syntax

UPDATE table_name
SET column1=value, column2=value2,...
WHERE some_column=some_value
Copy after login

Note: Please note the WHERE clause in UPDATE syntax. The WHERE clause specifies which records need to be updated. If you want to leave out the WHERE clause, all records will be updated!

To learn more about SQL, visit our SQL tutorials.

In order for PHP to execute the above statement, we must use the mysqli_query() function. This function is used to send a query or command to the MySQL connection.

Example

In the previous chapters of this tutorial, we created a table named "Persons" as shown below:

What does update mean in php

The following example updates some data in the "Persons" table:

<?php
$con=mysqli_connect("localhost","username","password","database");
// 检测连接
if (mysqli_connect_errno())
{
    echo "连接失败: " . mysqli_connect_error();
}
mysqli_query($con,"UPDATE Persons SET Age=36
WHERE FirstName=&#39;Peter&#39; AND LastName=&#39;Griffin&#39;");
mysqli_close($con);
?>
Copy after login

After this update, the "Persons" table looks like this:

What does update mean in php

For more PHP related knowledge, please visit PHP Tutorial!

The above is the detailed content of What does update mean in php. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template