Question types: Regular expression short answer
qtype_regexp
This question type (for the Moodle quiz module) aims at a more advanced system of student's response analysis, through the use of regular expresssions. This question type is an extension of the SHORTANSWER type. It can be used on its own and can also be incorporated into the existing Cloze (embedded) question type.
Maintained by: 
Joseph Rézeau
Sets
This plugin is part of set Regular expression questions. Plugins from the set work the best when installed together.
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Contributors
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I am trying to install this plugin to our Moodle dev environment, then I found out that our Moodle build is 2011070102.01, which doesn't meet the minimum version requirement you post for this plugin.
Is there anyway you can make this plugin compatible with 2.1.2 earlier build, like ours, or we have to upgrade our Moodle to be able to install and use it?
Thanks for your time.
Bei
I'm trying to use your plugin on a moodle 2.3.2+ installation which meets the plugin's minimum requirements. On the other hand the plugin requires a new version of the two required question behavior plugins. The problem is that the ones available in the plugin directory are too old.
Can you please make the new plugins available ?
Thanks in advance,
Patrick
great work, thank you very much!
Perfect in Quiz/Tests.
Imho you should add the 'missing links' for plugins related to question behaviour.
I didn't perform any tests if this plugin works without all redundancies to '... behaviour...' inside the version.php.
We are using the latest 2.5 version of this with the two question behaviours but there is an issue with saving the answers if the user goes back to revisit any questions. All of the sudden the answers have disappeared.. I found this post from a few years ago where someone was having the same issue. - https://moodle.org/mod/forum/discuss.php?d=68418
We're using the latest versions... any ideas?
Many Thanks
Andrea
1. Its not matching as correct, things it should.
2. Wherever I had [ ] to match a whitespace it replaces that with ()
3. If I try to do [ ]+ to match one or more whitespace or some other potential character class [abc]+ I get the message that I cannot have an unescaped metacharcter + * ? $ in a question with a value of more than 0! This is crazy and kind of defeats the purpose of having regular expressions!
It worked in the previous version, 2.3.