bbp_digest_forums values

Hi,

I try to do an independent php script to save email alerts according to a prior choice of questions to the user after registering.

My problem is the variability of the values ??of field meta_key “bbp_digest_forums”, including the value of “s”, from 3 forums, in, for example:
a: 3: {i: 0; s: 4: “5728”; i: 1; s: 4: “5732”; i: 2; s: 5: “13733”;}
By now it is 4 or 5 for the third forum, so I can not run the script every time.

Do you have any indication on this?
Thank you for your return!

https://www.ads-software.com/plugins/bbpress-digest/