Server-side processing refers to the execution of code on the server before sending the final result to the client.

In PHP, server-side processing can be used to perform a variety of tasks:

1. Data validation: PHP can validate user input on the server-side before performing any actions or saving the data.

2. Database operations: PHP can interact with databases to perform operations like retrieving, updating, and deleting data.

3. File handling: PHP can read and write files on the server, allowing for tasks like file uploads, generating reports, and manipulating data.

4. Session management: PHP can handle sessions to store and retrieve user-specific data between requests.

5. User authentication and authorization: PHP can verify user credentials, check permissions, and control access to specific resources.

To perform server-side processing with PHP, you need a web server with PHP installed. You can then create PHP scripts that handle specific tasks and execute them on the server.

Here’s a basic example of a PHP script that performs server-side processing:



This script retrieves user input from a form, validates it, and performs further operations based on the validation result. The script can then generate a response, such as displaying an error message or redirecting the user to another page.

Server-side processing with PHP is commonly used in web applications to handle complex logic and interact with databases or external APIs. It allows for secure and efficient execution of tasks that cannot be performed on the client-side alone.