I'm using JMS in combination with Fabrik. I have a Fabrik element that I need to populate with the JMS site ID. What is the PHP code that I need to run on the Fabrik element to retrieve that value?

You can either use a hidden field for which you assign a specifc default value like {{site_id}} and combine it with the Multisites ID plugin or directory code in PHP the behavior for a special field type that would be computed base on the MULTISITES_ID define. When it is defined, it contain the site_id otherwise, this is the master.

I've tried using {{site_id}} as the field value, but it just evaluates to "{{site_id}}". Could you give me some example PHP code that would let me retrieve this value?

this is explained in my previous post. If you are a PHP developer, you should know what mean "use the define MULTISITES_ID".
Read the PHP multisites ID plugin code if you want to see how to do.

$variable = MULTISITES_ID;

It's not a good idea to alienate your paying customers. I'm a PHP developer out of necessity, and relatively inexperienced. I'm also used to forums where paid customers receive the answers and the help they're looking for from the developers/admins. A few lines of code that you already know how to write would be much quicker and more helpful than saying "[I] should know what [you] mean". I guess I'll try to figure it out and post back here when it's working so that other people wondering how to do this will have functional example to work from.

Working Example:



Tested this on the master site, a slave template site and a general slave site and all is well. Hope it helps someone.