Disable cache on php and html with AJAX

Question

I use AJAX for my website and my website some part load after document is ready by AJAX and those parts are dynamic.

Example one part: Hello #USERNAME# this is different for every ID, When i log in to first ID show my username but when log in to second ID this name do not change and show first ID username.

I disabled cache in all PHP pages by above code:

<?php 
header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
?>

But cache is not disabled.

PRO TIP: To keep from caching AJAX requests add a pseudo timestamp to the end of the URL you request. — Jay Blanchard
– Jay Blanchard, Commented Nov 5, 2014 at 17:46
An example of what Jay Blanchard is saying above, is to request the page like this: 'yoursite.com/ajax_script.php?t=1152014105753' where the string of numbers is the current date/time down to the second. This will skip caching and treat it like a new file to your browser. — Morgan
– Morgan, Commented Nov 5, 2014 at 17:58

Community · Accepted Answer · 2017-05-23 11:46:41Z

2

I believe this question is a little bit of a duplicate. However, if you want to ensure that caching does not happen on ajax calls, you can append a timestamp to the end of the URL you are hitting.

Example in your JavaScript AJAX prep:

var time_stamp = new Date().getTime();
var myurl = "url_here.php?timestamp=" + time_stamp;
jQuery.get(myurl, /* more parameters */);
/* other relevant code */

Here are some other sources from Google:

Another thing to consider is that it might not be a caching issue. Are you properly clearing any sessions/cookies? (If you are using them)

edited May 23, 2017 at 11:46

CommunityBot

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answered Nov 5, 2014 at 18:01

Michael Lea Crawford

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