RE: [PHP] php mysql live feed
- From: tmboyd1@xxxxxxxx ("Boyd, Todd M.")
- Date: Wed, 21 May 2008 09:37:27 -0500
Nameless,
I see someone mentioned the setTimeout(function, milliseconds) function for JavaScript. I would also like to point out that you can use setInterval(function, milliseconds) in order to have an event repeat at a set interval. For instance, let's say you had a page laid out like so:
---
<div id="blah">
Text here
</div>
---
You would want to add a script somewhere that would begin the interval in order to update the div:
---
<script type="text/javascript">
function ajaxRequest()
{
// <insert postback code here>
document.getElementById("blah").innerHTML = ajax.responseText;
}
var t = setInterval("ajaxRequest()", 5000);
</script>
---
This assumes that your XmlHttpRequest object is named "ajax". Assigning the interval to variable "t" ensures that you can clear the interval if you need to (via "clearInterval(t);").
I suppose "innerText" can be used instead of "innerHTML", as well. I would recommend using innerHTML only if you will be populating the div with HTML code, however.
Hope this helps,
Todd Boyd
Web Programmer
-----Original Message-----
From: admin@xxxxxxxxxxxxxxxxxxx [mailto:admin@xxxxxxxxxxxxxxxxxxx]
Sent: Tuesday, May 20, 2008 3:25 PM
To: php-general@xxxxxxxxxxxxx
Subject: [PHP] php mysql live feed
Okay before i pull more hair out...
I am trying to use php to pull mysql data and refresh the mysql data
every say 5 seconds for like a live display of the database without the
screen reloading.
I want the data to refresh but not the screen. Ajax seems to hate me
because everything i have seen/read/tried is wrapped around ASP.NET or
requires a user interaction to invoke the query.
If you have example scripts or a good tutorial that actually works
where you can open a php script and the data changes on the page as the
database does and the screen does not refresh, and you don’t have to
onclick, onfocus, or onblur kind of thing. I would be in your debt
Frustrated Rick
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