PHP Upgrade and i2b2 Webclient Compatibility

[Thuy Le]

Hello,

We recently received notice of a critical PHP security vulnerability and need to upgrade from PHP 8.0.30 to a newer version, possibly 8.5.12. Our i2b2 environment is hosted on Linux.

Has anyone recently upgraded PHP to a newer version? If so, did you encounter any issues with the i2b2 Webclient after the upgrade?

We’d especially like to know whether anyone is currently running i2b2 with PHP 8.5.x or if there are any known compatibility issues with newer PHP versions.

Thanks in advance for any information or experience you can share!

Thanks!

[Kevin Bui]

I am running the latest version of i2b2 with PHP 8.5.11 on my Linux dev machine.  You will need to update the proxy.php file with the latest PHP syntax.  Some of the PHP syntax in the proxy.php no longer work.

I was going to attach my proxy.php file as an example, but I don't know how to do it here.

[Thuy Le]

Hi Kevin,

Thank you so much! That is very helpful. Since you’re unable to share it here, would you be willing to send it to me via email at l...@ochin.org?

Thuy

[Kevin Bui]

I just sent it to you.  Feel free to reach out if you have any issues.

[Mendis, Michael E.]

Kevin

Would it be possible to post the php as just a text message and not an attachment?

Mike

On Oct 21, 2026, at 8:26 PM, Kevin Bui <kvb2un...@gmail.com> wrote:



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