MySQL Delete Data

MySQL Delete Data （MySQL删除数据）

The Ultimate Guide to Deleting Data in MySQL with PHP #

The Ultimate Guide to Deleting Data in MySQL with PHP （使用PHP删除MySQL数据的终极指南）

In this article, we’ll go over the steps needed to delete data in a MySQL database using PHP. Whether you’re looking to clean up old data or remove sensitive information, this guide has everything you need to know to get started. （在本文中，我们将介绍使用PHP删除MySQL数据库中数据所需的步骤。无论您是想清理旧数据还是删除敏感信息，本指南都能为您提供入门所需的一切信息。）

Step 1: Connect to Your MySQL Database #

Before you can delete any data, you’ll need to connect to your MySQL database using PHP. Here’s an example of how to do it:

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database_name";

// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn) {
   die("Connection failed: " . mysqli_connect_error());
}

In this example, replace localhost with the name of your server, username and password with your login credentials, and database_name with the name of your database. （在此示例中，将localhost替换为服务器名称，将用户名和密码替换为登录凭据，将database_name替换为数据库名称。）

Step 2: Write Your DELETE Statement #

Once you’ve connected to your database, you can start writing your DELETE statement. This is the SQL code that will actually delete the data from your database. Here’s an example of a DELETE statement:

DELETE FROM table_name
WHERE column_name = value;

In this example, replace table_name with the name of your table and column_name with the name of the column you want to use to filter the data. You’ll also need to replace value with the actual value you want to delete. （在此示例中，将table_name替换为表的名称，将column_name替换为要用于筛选数据的列的名称。您还需要将值替换为要删除的实际值。）

Step 3: Execute Your DELETE Statement with PHP #

Now that you’ve written your DELETE statement, you can execute it using PHP. Here’s an example of how to do it:

<?php
$sql = "DELETE FROM table_name WHERE column_name = value";

if (mysqli_query($conn, $sql)) {
   echo "Record deleted successfully";
} else {
   echo "Error deleting record: " . mysqli_error($conn);
}

In this example, replace table_name and column_name with the names from your DELETE statement. You’ll also need to replace value with the actual value you want to delete. （在此示例中，将table_name和column_name替换为DELETE语句中的名称。您还需要将值替换为要删除的实际值。）

Step 4: Close Your Connection #

Finally, once you’ve executed your DELETE statement, you’ll need to close your connection to the MySQL database. Here’s an example of how to do it:

<?php

mysqli_close($conn);

And that’s it! You’ve successfully deleted data from a MySQL database using PHP. （大功告成！您已成功使用PHP从MySQL数据库中删除数据。）

Conclusion #

Deleting data in a MySQL database using PHP is a straightforward process, and with this guide, you should have everything you need to get started. Whether you’re looking to clean up old data or remove sensitive information, this guide has you covered. So why wait? Start deleting data in your MySQL database today! （使用PHP删除MySQL数据库中的数据是一个简单的过程，在本指南中，您应该具备开始使用所需的一切。无论您是想清理旧数据还是删除敏感信息，本指南都能为您提供帮助。那么为什么还要等呢？立即开始删除MySQL数据库中的数据！）