How do I migrate from MySQL to MySQLi in PHP?

Migrating from MySQL to MySQLi

Migrating a website from MySQL to MySQLi involves modifications to the PHP code, but the database itself remains largely unaffected. MySQLi, an improved version of the MySQL extension, offers enhanced functionality and security.

PHP Code Changes

Yes, you can simply substitute MySQLi functions for MySQL functions. Here's a quick table for reference:

MySQL Function	MySQLi Function
mysql_connect	mysqli_connect
mysql_select_db	mysqli_select_db
mysql_query	mysqli_query
mysql_fetch_array	mysqli_fetch_array

Additional Considerations

While the PHP changes are straightforward, it's important to note the following:

• Compatibility: Ensure that your PHP server and web framework support MySQLi.
• Error Handling: MySQLi has different error handling mechanisms. Review the documentation for proper usage.
• Query Security: MySQLi offers improved query security with prepared statements (mysqli_prepare). Consider using them to prevent SQL injection attacks.
• Database Connection Management: Unlike MySQL, MySQLi handles database connections differently. It is often necessary to use try-catch blocks or object-oriented syntax for error handling and resource cleanup.
• Help and Resources: For further guidance, refer to the MySQLi documentation at [https://www.php.net/manual/en/book.mysqli.php](https://www.php.net/manual/en/book.mysqli.php).

Remember, the database structure and data remain the same during the migration from MySQL to MySQLi, and the focus is primarily on updating the PHP code that interacts with the database.

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