Using Prepared Statements in PHP to Avoid SQL Injection Attacks

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Security in web development is a critical concern, and one of the most common threats is SQL injection. This type of attack occurs when an attacker inserts malicious SQL code into the queries of a web application. One of the best practices to prevent this type of vulnerability is to use prepared statements .

In this article, we will explore what prepared shareholder database are and how they can be implemented in PHP to strengthen the security of our applications.

Table of contents

What are Prepared Statements?
Advantages of Prepared Statements
PHP Implementation
Conclusions
What are Prepared Statements?
A prepared statement is a feature that allows SQL statements and user-supplied data to be separated. Instead of directly concatenating values ​​in a SQL query, placeholders are used to represent the data. These values ​​are then assigned to the placeholders through a binding process before the query is executed.

Advantages of Prepared Statements
SQL Injection Prevention: By separating data from SQL queries, you eliminate the possibility of an attacker injecting malicious code.
Performance Optimization: Some database engines can optimize the performance of prepared queries because they can be cached and reused.
Code Maintainability: Code is cleaner and easier to maintain as SQL queries and data are clearly separated.
PHP Implementation
Let's see a practical example of how to use prepared statements in PHP with the MySQLi extension: