Update PHP version

ExpressionEngine 2.3.1 was released on October 17, 2011. PHP 5.4.0 was released nearly five months later on March 1, 2012. So while it may have been compatible, it’s not possible to say with certainty. There are some bug fixes in v2.5.1 released two months after PHP 5.4 that addressed some PHP 5.4 bugs, so I am inclined to say that 2.3.1 will not be compatible.

That said, 2.3.1 is over five years old, and PHP 5.4 hasn’t had active support by PHP since late 2014. The best advice would be for you to update to at least the latest release of v2, and for your host to update to PHP 7, or at least PHP 5.6.

Hi Derek,

Thank you very much. If we upgrade from EE 2.3.1 to latest version of EE v3.4.4, would that work on PHP 5.4.45 ? The hosting team told that they only have PHP 5.4.45 now.

Regards Debasish

Both PHP 5.4 and 5.5 are way past their end of life. If you can’t use PHP 7 (and you should, it’s awesome), 5.6 at least is a must in my book. That said, requirements for EE3 state PHP 5.3.10 or better, so you could at least give it a try.

Hi Greil,

EE v2.3.1 is running properly in PHP 5.4.45. Can you Please confirm whether it will run in MySQL 5.5 or not? Hosting provider is updating the OS and there will be no MySQL 5.1 support.

Regards Debasish

MySQL 5.5 should not be an issue. And yes, ExpressionEngine 3.4 would still work on PHP 5.4, but there are compelling business and technical reasons to encourage you to move to a platform using PHP 7 or at least PHP 5.6.