How Can I Migrate My PHP Code from `mysql` to `mysqli`?

Migrating from mysql to mysqli

In this article, we provide a comprehensive guide on converting your PHP scripts using the legacy mysql extension to the improved mysqli extension.

The first step involves replacing all mysql_ function calls with their mysqli_ counterparts. This switch is particularly effective if your code already adheres to the procedural API, making the migration process smoother. Refer to the MySQLi Extension Function Summary for a detailed mapping of function equivalents.

Some functions may require closer examination of their parameters due to subtle differences. For instance, while mysql requires users to explicitly select a database with mysql_select_db after establishing a connection, mysqli enables database specification as the fourth parameter of mysqli_connect. However, mysqli_select_db remains available as an option if preferred.

Once the conversion process is complete, execute the updated script to verify its functionality. If errors arise, it's time for thorough debugging.

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