Migrating from MySQL to MySQLi is a crucial task for every web developer. With the release of PHP 5.5.0, the MySQL extension has been deprecated in favor of MySQLi (MySQL improved). MySQLi is a more advanced and feature-rich library that provides better performance and security than the old MySQL extension.
If you are planning to migrate from Tech latest update to MySQLi, you should follow some best practices to ensure that the migration process goes smoothly. In this article, we will discuss how to migrate from MySQL to MySQLi step-by-step.
Step 1: Backup your database
Before you start the migration process, it is important to backup your database. This will help you avoid data loss in case something goes wrong during the migration process. You can use any backup tool or utility to backup your database. If you are using a web hosting service, your hosting provider may offer an option to backup your database.
Step 2: Update your code
The next step is to update your code to use the MySQLi library. MySQLi is an object-oriented library, so you will need to update your code to use objects instead of the old procedural functions. You should also update your code to use prepared statements instead of the old mysql_real_escape_string() function to avoid SQL injection attacks.
Step 3: Test your code
Once you have updated your code, you should test it thoroughly to ensure that everything is working as expected. You should test your code in a development environment before deploying it to the production environment. You can use tools like PHPUnit or Selenium to automate your testing process.
Step 4: Update your database connections
The next step is to update your database connections to use call to undefined function mysql_connect() instead of the old MySQL extension. You should update your connection strings in all the files where you have used the old MySQL extension. You should also update your database configuration file to use the MySQLi library.
Step 5: Disable the old MySQL extension
After you have updated your code and database connections, you should disable the old MySQL extension to ensure that your code is using the new MySQLi library. You can do this by commenting out the line extension=mysql.so in your php.ini file.
Step 6: Monitor your application
Once you have completed the migration process, you should monitor your application to ensure that everything is working as expected. You should monitor your application for any errors or performance issues. You can use tools like New Relic or AppDynamics to monitor your application.
In conclusion, migrating from MySQL to MySQLi is a critical task for every web developer. By following these best practices, you can ensure that the migration process goes smoothly and your application works seamlessly with the new MySQLi library. Remember to backup your database before starting the migration process and test your code thoroughly before deploying it to the production environment.
