Refreshing my php page with AJAX every 5 seconds
Question
I'm creating a link-sharing website and on my index.php page (the page I want to refresh every 5 seconds) there are posts/links that must appear automatically (AJAX refreshing) without the user to refresh by him/herself or pressing F5 the whole time.
How would this work, precisely?
5 answers
solution1
4 ACCPTED 2011-10-12 13:42:33
You should use the setInterval javascript function to deal with this issue.
setInterval(callServer, REFRESH_PERIOD_MILLIS);
See:
- some info on ajax Periodic Refresh
- javascript setInterval documentation
- [edit] some good refresh examples , especially without js framework (depending wether you want to use jquery, mototools, another or no framework...)
solution2
1 2011-10-12 13:47:34
Is there a need to use AJAX? Unless I'm missing something; you could use the meta refresh tag:
<meta http-equiv="refresh" content="5">
I would recommend increasing the time between refreshes as this will put a heavier load on the server and may cause to freeze, or slow down the site.
solution3
1 2011-10-12 13:51:01
you have to user the setInterval method to call your ajax function to inject new content into your div:
<HTML>
<HEAD>
<TITLE>Hello World Page</TITLE>
<script language="JavaScript">
function xmlhttpPost(strURL) {
var xmlHttpReq = false;
// Mozilla/Safari
if (window.XMLHttpRequest) {
xmlHttpReq = new XMLHttpRequest();
if (xmlHttpReq.overrideMimeType) {
xmlHttpReq.overrideMimeType('text/xml');
// See note below about this line
}
// IE
} else if (window.ActiveXObject) { // IE
try {
xmlHttpReq = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!xmlHttpReq) {
alert('ERROR AJAX:( Cannot create an XMLHTTP instance');
return false;
}
xmlHttpReq.open('GET', strURL, true);
xmlHttpReq.setRequestHeader('Content-Type',
'application/x-www-form-urlencoded');
xmlHttpReq.onreadystatechange = function() {
callBackFunction(xmlHttpReq);
};
xmlHttpReq.send("");
}
function callBackFunction(http_request) {
if (http_request.readyState == 4) {
if (http_request.status == 200) {
var responceString = http_request.responseText;
//TODO implement your function e.g.
document.getElementById("myDiv").InnerHTML+ = (responceString);
} else {
alert('ERROR: AJAX request status = ' + http_request.status);
}
}
}
setInterval("xmlhttpPost('test.php')", 5000);
</script>
</HEAD>
<BODY>
Hello World
<div id="myDiv"></div>
</BODY>
</HTML>
solution4
0 2014-08-30 22:15:42
You can use javascript setInterval function to load the contents each and every 5 sec.
For your reference please visit below link-
solution5
0 2011-10-12 13:46:19
Use setInterval(myAjaxCallbackfunction,[time in ms]). Callback uses property of js that function are first class members(can be assigned to variables), and can be passed as argument to function for later use.
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