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Problem with PHP aplication updates because of the browser cache

Answer 1

A:

store the last update in a variable and use ajax to do a ajax request every minute and to check wheterh the update time differs from the stored update time in the variable. if so do a reload with window.location = "the new location";

EDIT:

it should look like this: (but i didn't test it so i don't guarantee it to work)

var updateTime = '<?php echo $lastUpdateTime;?>';
$(document).laod(function(){
    var reload = window.setInterval("request()", 60000);
});

function request(){
    $.get("last_update.php", function(data){
        if(updateTime != date) window.location = "redirect_to.php";
    });
}

EDIT 2: This is HTML for including jquery:

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"&gt;&lt;/script&gt;

this "redirect_to.php" is the file you redirect the window to. so if you want to stay on the same site just put the url of the site there.

<?php $lastUpdateTime;?> was a bit wron inline PHP. i corrected it to <?php echo $lastUpdateTime;?>

last_update.php is just a page that returns the last update. how you keep track of the last update is up to you.

ITroubs 2010-10-11 10:25:01

I don't understand well how to do that.

pepersview 2010-10-11 10:40:54

see my edit. btw you need to include the jquery source to use my example!

ITroubs 2010-10-11 11:48:02

Thank so much for clarify my doubts. What last_update.php is suppose to have inside? We dont keep track of updates, we just make the changes in the application that are requested.

pepersview 2010-10-12 08:51:40

then you should start to keep track of your changes at least in the way that you put the date and time of the last changin into that last_update.php

ITroubs 2010-10-12 08:53:14

Should then we create a last_update.php file an write in it the date and time? Just this? Thanks

pepersview 2010-10-12 09:55:48

this would be the minimal solution. <?php $lastUpdateTime = '2010-10-05 15:30:25'; if(!empty($_GET['echo_it']) echo $lastUpdateTime;?> and call it like this `$.get("last_update.php?echo_it=doesntmatter",` and do an include of the last_upload.php in your php where you put the jquery code into

ITroubs 2010-10-12 10:01:44

Answer 2

A:

IE caches files from the same URL, let's say you're loading js-files from your html header, you can try and randomize a query number in the url, just to force IE to interpret this as a new URL and reload it.

Example:

<?php 
    $random = rand(1, 100000);

?>
<head>
<script type="javascript/text" src="../js/foo.js?v=<?php echo $random;?>"></script>
</head>
...

This will output something like

<script type="javascript/text" src="../js/foo.js?v=5"></script>

if you make sure the URL is "dynamic" IE will be forced to reload it.

Stefan Konno 2010-10-11 12:46:18

The problem is not only with IE, we also had it in Mozilla.

pepersview 2010-10-12 07:57:34

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Problem with PHP aplication updates because of the browser cache

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