即使将随机值添加到php请求，IE也会缓存JSON结果

This approach is working with JS/AJAX/PHP/JSON but when once I converted my requests to JQuery - IE started caching the result again... The scenario is when a user changes select options in a listbox (my_lstbx) there's a call to php/ajax and results come back within an array.

$(document).ready(function() {
    $('#my_lstbx').change(function() {
        $.getJSON('Code/my_details.php'+'?'+'Math.round(new Date().getTime())', {request_id:this.value}, function(response) {
         .......
          ........
           .........

this is the JS version that I previously asked and it's working - PHP - IE doesn't display updated values from database. Chrome, FF, Opera - OK

You're passing Math.round(new Date().getTime()) as a string! :D it wont get executed but will always be the same.

Change to:

$.getJSON('Code/my_details.php?' + new Date().getTime(), {request_id:this.value}, function(response) {