Hi,
you see a really basic ajax call could be this:
In a question of type "short text"
Code:
<script type="text/javascript" charset="utf-8">
$(document).on('ready pjax:scriptcomplete',function(){
$.post('https://www.myServer.de/getMyValue.php' , { sid: "{SID}", gid: "{GID}", qid: "{QID}" } ,function(data) {
$('#question{QID} input[type="text"]').val(data);
});
// Uncomment to hide the question
// $('#question{QID}').hide();
});
</script>
You see, three values - SurveyID SID, GroupID GID and QuestionID QID are posted to the php script that does the work and returns something into the question.
And in the php you may use a direct access to the database or the LimeSurvey API to query the database and calculate your desired values
Joffm
