php equivalent of asp.net UPDATEPANEL

Hello,

I am trying to find a similar way to update a part of a page just like updatepanel works in asp.net. Is there a ready function / component to use with php?

For example I want to have a DIV with some content and if someone clicks a button to refresh that DIV and add some contents retrieved from the database.

Thanks,
John
infodiggerAsked:
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gamebitsCommented:
You would have to use AJAX for that
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Joe WuDeveloper | Solutions Architect | CTOCommented:
As gamebits said, using ajax is a good way. To get you started here is a general function for ajax with PHP, but you have to change the values accordingly, code commented.
<script language="javascript" type="text/javascript">
function callAjax()
{
	var url = "test.php?user=myself"; // dummy, change to whatever your url is going to be...
	ajaxQuery(url);
}
 
function ajaxQuery(url)
{
	var page_request = false;
	
	// If  the browser is Mozilla, Safari etc
	if (window.XMLHttpRequest)
	{
		page_request = new XMLHttpRequest();
	}
  
	// If the Browser is Internet Explorer
	else if (window.ActiveXObject)
	{
		try
		{
			page_request = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			try
			{
				page_request = new ActiveXObject("Microsoft.XMLHTTP");
			}
		  	catch (e){}
		}
	}
	else { return false; }
  	
	page_request.open('GET', url, true);
	
	// When request is Ready
	page_request.onreadystatechange=function()
	{	
		if (page_request.readyState == 4 && page_request.status==200)
		{
			document.getElementById('results').innerHTML = page_request.responseXML;
		}
	}
	if(window.XMLHttpRequest)
	{
		page_request.send(null);
	}
	else
	{
		page_request.send();
	}
}
</script>
 
<a href="#" onclick="callAjax();">click for Ajax</a><br><br>
<span id="results">This text is going to change after the ajax call...</span>

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itzik_horeshCommented:
i'm trying to implement this on wordpress site ->
 problem= pressing on the link doesn't change the url in the addressbar
any other solutions for this?
as i recall in asp the url also changed !!
and realy calling another address with diffrent SQL query,
while leaveing some element on the page intact and not going to the annoying white blink
i want to preserve the menu in place, while page data changes
only solution i came in mind right now is to use iframe for that but since i want the url address to change accordingly to links pressed - any ideas how to do that? web-layout for wordpress
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