MySQL vs MySQLi when using PHP


Which is better, MySQL or MySQLi? And why? Which should I use?

I mean better not just in terms of performance, but any other relevant feature.

2/8/2016 12:22:11 AM

Accepted Answer

If you have a look at MySQL Improved Extension Overview, it should tell you everything you need to know about the differences between the two.

The main useful features are:

  • an Object-oriented interface
  • support for prepared statements
  • support for multiple statements
  • support for transactions
  • enhanced debugging capabilities
  • embedded server support.
12/30/2015 5:52:09 AM

There is a manual page dedicated to help choosing between mysql, mysqli and PDO at

The PHP team recommends mysqli or PDO_MySQL for new development:

It is recommended to use either the mysqli or PDO_MySQL extensions. It is not recommended to use the old mysql extension for new development. A detailed feature comparison matrix is provided below. The overall performance of all three extensions is considered to be about the same. Although the performance of the extension contributes only a fraction of the total run time of a PHP web request. Often, the impact is as low as 0.1%.

The page also has a feature matrix comparing the extension APIs. The main differences between mysqli and mysql API are as follows:

                               mysqli     mysql
Development Status             Active     Maintenance only
Lifecycle                      Active     Long Term Deprecation Announced*
Recommended                    Yes        No
OOP API                        Yes        No
Asynchronous Queries           Yes        No
Server-Side Prep. Statements   Yes        No
Stored Procedures              Yes        No
Multiple Statements            Yes        No
Transactions                   Yes        No
MySQL 5.1+ functionality       Yes        No


There is an additional feature matrix comparing the libraries (new mysqlnd versus libmysql) at

and a very thorough blog article at

Licensed under: CC-BY-SA with attribution
Not affiliated with: Stack Overflow