What is the difference between mysql_query() and mysqli_query()?

Introduction

When working with MySQL in PHP, you may come across two different ways to execute queries: mysql_query() and mysqli_query(). Although both functions can be used to perform similar tasks, there are key differences between them.

mysql_query()

Overview

The mysql_query() function is part of the old MySQL extension that was used in PHP. It provides a way to execute SQL queries against a MySQL database. However, this extension is deprecated and removed as of PHP 7.0.0.

Usage

To use mysql_query(), you need to connect to the database using mysql_connect() first. After establishing a connection, you can call mysql_query() to run your SQL statements.

mysqli_query()

Overview

On the other hand, mysqli_query() is part of the MySQLi extension, which stands for MySQL Improved. This extension provides an enhanced interface for interacting with MySQL databases, offering more features and better performance compared to the old MySQL extension.

Usage

To use mysqli_query(), you need to connect to the database using mysqli_connect(). Once connected, you can use mysqli_query() to execute your SQL queries.

Key Differences

• Support and Compatibility: mysql_query() is deprecated and no longer supported in PHP 7.0 and later, while mysqli_query() is supported and provides better features.
• Improved Features: The MySQLi extension offers additional features such as prepared statements and object-oriented API, which are not available in the old MySQL extension.
• Performance: MySQLi provides better performance due to its improved API and enhanced features.

Conclusion

Given that mysql_query() is deprecated, it is strongly recommended to use mysqli_query() or PDO (PHP Data Objects) for interacting with MySQL databases in your PHP applications.