Right now I'm struggling to get this simple PHP AJAX request to work.
<html>
<head>
<script type="text/javascript">
function getSuggestions(type){
if(type == "")
{
document.getElementById("entries").innerHTML="test"
return;
}
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlHttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlHttp.onreadystatechange = function(){
if(xmlHttp.readyState == 4 && xmlHttp.status == 200)
{
document.getElementById("entries").innerHTML=xmlHttp.response;
}
}
xmlHttp.open("GET","getData.php?status="+type,true);
xmlHttp.send();
}
</script>
</head>
<body>
<div id="A" onclick='getSuggestions("A")'>Click for A</div>
<div id="P" onclick='getSuggestions("P")'>Click for P</div>
<div id="R" onclick='getSuggestions("R")'>Click for R</div>
<div id="entries"></div>
</body>
</html>
Below is getData.php
<?php
$status = $_GET["status"];
echo $status;
?>
Everytime I click on any of the tags I get "undefined" in the "entries" tag. Could anybody explain why it's undefined?
use xmlHttp.responseText
This is how I handle AJAX. Essentially an example of akellehe's answer
function getSuggestions(type){
if(type == "") {
document.getElementById("entries").innerHTML="test"
return;
}
var r = getXmlObject();
var url= "getData.php?status="+type;
if (r.readyState == 4 || r.readyState == 0) {
r.open("POST", url, true);
r.onreadystatechange = function (){
if (r.readyState == 4) {
document.getElementById("entries").innerHTML= r.responseText;
}
};
r.send(null);
}
}
////////////////////////////////////
function getXmlObject() {
if (window.XMLHttpRequest) {
return new XMLHttpRequest();
} else if(window.ActiveXObject) {
return new ActiveXObject("Microsoft.XMLHTTP");
} else {
alert('Status: Cound not create XmlHttpRequest Object. Consider upgrading your browser.');
}
}
Related
<html>
<head>
<script>
function showUser(str) {
if (str == "") {
document.getElementById("txtHint").innerHTML = "";
return;
} else {
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
} else {
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
document.getElementById("txtHint").innerHTML = this.responseText;
}
};
xmlhttp.open("GET","getuser.php?q="+str,true);
xmlhttp.send();
}
}
</script>
}
</script>
Code is working 100% but my problem is in script in place of getuser.php i want to use action for example "action=records" . what should i change
I am trying to create a ajax function to just reload a <div> and not the entire page.
What is working:
-during writing in the input field the div is reloaded after every character correctly.
What is not working:
-when the input field is complete empty again, it is not showing the whole entries I have in the database.
this is what I have in the php file where the div is:
function showGames(str) {
if (str == "") {
document.getElementById("searchgame").innerHTML = "";
return;
} else {
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
} else {
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
document.getElementById("show").innerHTML = xmlhttp.responseText;
}
};
xmlhttp.open("GET","searchgame.php?game="+str,true);
xmlhttp.send();
} }
this is what I have in the search.php
<?php
include 'test/database.php';
$pdo = Database::connect();
if($_GET['game'] == "") {
$sql="SELECT * FROM games WHERE active=1";
echo "<script type='text/javascript'>alert('Should be empty')</script>";
} else {
$q = $_GET['game'];
$sql="SELECT * FROM games WHERE gamenamelong LIKE '%".$q."%'";
}
$stmt = $pdo->prepare($sql);
$stmt->execute();
$gameResults = $stmt->fetchAll(PDO::FETCH_ASSOC);
$rowCount1 = count($gameResults);
Is anybody able to help me?
Thank you!
since we don't know how your form looks like, and what calls the function showGames how, I can only give a vague answer. But your main problem/misstake should be solved with that:
In your function showGames you never hit the ajax if the search string is empty, so you can't get back all results.
So I suggest to change that function like so:
function showGames(str) {
if (str == "") {
document.getElementById("searchgame").innerHTML = "";
//remove that: return;
}
// remove the 'else { '
// now you allways hit the ajax
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
} else {
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
document.getElementById("show").innerHTML = xmlhttp.responseText;
}
};
xmlhttp.open("GET","searchgame.php?game="+str,true);
xmlhttp.send();
// remove closing bracket of if-else: '}'
}
by using javascript ajax i have passed the values to php page...
display the values after retrieving from database and print in ajax page...it displaying in alert page...but i need to display in ajax page....
ajax coding
<script>
function optionsAlert()
{
alert("call");
var xmlhttp;
var qw=document.getElementById('c').value;
var qw1=document.getElementById('c1').value;
var qw2=document.getElementById('unit33').value;
var qw3=document.getElementById('dept').value;
var qw4=document.getElementById('class').value;
alert(qw);
alert(qw1);
alert(qw2);
alert(qw3);
alert(qw4);
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
alert(xmlhttp.responseText);
if(xmlhttp.responseText==1){
alert("name already Exists" );
return false;
}
else if(xmlhttp.responseText==0)
{
alert("name available");
document.login.submit();
}
}
}
var queryString = "?q=" + qw + "&q1=" + qw1 + "&q2=" + qw2 + "&q3=" + qw3 + "&q4=" + qw4;
xmlhttp.open("get",'ques.php' + queryString,true);
xmlhttp.send();
}
php page
<?php
include('connection.php');
if(($_GET['q']!='') && ($_GET['q1']!='') && ($_GET['q2']!='') && ($_GET['q3']!='') && ($_GET['q4']!=''))
{
$a= mysql_query("select * from unit1 where unit='".$_GET['q']."' and stopic='".$_GET['q1']."' and qtype='".$_GET['q2']."' and dept='".$_GET['q3']."' and class='".$_GET['q4']."'");
//$a= mysql_query("select * from unit1 where unit='unit1' and stopic='Subtopic1' and qtype='normal questions'");
if(mysql_num_rows($a)>0)
{
while($row=mysql_fetch_array($a))
{
$a1=$row['qno'];
$a2=$row['ques'];
$a3=$row['ch1'];
$a4=$row['ch2'];
$a5=$row['ch3'];
$a6=$row['ch4'];
$a7=$row['ans'];
echo $a1."<br>";echo $a2."<br>";echo $a3."<br>";echo $a4."<br>";echo $a5."<br>";echo $a6."<br>";echo $a7."<br>";
echo 1;
}
}
else
{
echo 0;
}
}
?>
Below the ajax coding create div element with id
in your ajax method
if(xmlhttp.responseText==1){
document.getElementById("id").innerHTML = "name already Exists";
return false;
}
else if(xmlhttp.responseText==0)
{
document.getElementById("id").innerHTML="name available";
document.login.submit();
}
"id" your own div id
Following dropdown:
<select id='dropdown' name='dropdown' onchange='showChart(this.value)'>
<option value="1">Foo</value>
<option value="2">Bar</value>
</select>
Calls this javascript function onchange:
<script type="text/javascript">
function showChart(str1) {
if (str1 == "") {
document.getElementById("chartContainer").innerHTML = "";
return;
}
if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
}
else {// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
document.getElementById("chartContainer").innerHTML = xmlhttp.responseText;
}
};
xmlhttp.open("GET", "../ajaxpage/chart.php?charttype=" + str1);
xmlhttp.send();
}
</script>
chart.php?charttype looks like this:
<?php
$charttype = $_GET['charttype'];
if ($charttype == "1") {
echo "<p>test1</p>";
echo "<script type='text/javascript'>
alert('test1');
</script>";
} else {
echo "<p>test2</p>";
echo "<script type='text/javascript'>
$(document).ready(function() {
alert('test2');
});
</script>";
}
?>
Everything seems to work. The test1 and test2 in paragraph tags are rendered correctly in the graphContainer div onchange of the dropdown. However, the javascript is not executing. How come generated javascript does not execute, and how do I fix this?
Thanks.
EDIT
Here is the extremely foul (but working) workaround:
<img src="../images/loaded.gif" alt=""
onload="Code To Execute Here;this.parentNode.removeChild(this);" />
JavaScript is not evaluated with innerHTML.
I have to use this piece of code to save some values in table when page loads. The function to search values is in php. I have to use those values in script. I am trying this way but its not working.
<head>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
</head>
<body>
<script>
$(document).ready(function()
{
var msg_top = new array();
msg_top = "<"+"?php echo searchResults('windows');"+"?"+">";
var url = "msg2_mysql.php"
var request = null;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
request=new XMLHttpRequest();
}
else
{// code for IE6, IE5
request=new ActiveXObject("Microsoft.XMLHTTP");
}
request.open("POST", url, true);
request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
request.setRequestHeader("Connection", "close");
request.onreadystatechange = function(){
if (request.readyState == 4) {
if (request.status == 200) {
alert('POST');
} else {
alert(request.status); //
}
}
}
request.send("msg_top=" + encodeURIComponent(msg_top).replace(/%20/g, '+'));
});
</script>
if (request.readyState == 4) {
if (request.status == 200) {
//alert('POST');
} else {
alert(request.status); // fails here
}}
Should probably be something like:
if (request.readyState == 4) {
if (request.status == 200) {
//alert('POST');
} else {
alert(request.status); // fails here
}
}
}
If you pay proper attention to your indentation, you'll notice you never end the anonymous function you create at:
request.onreadystatechange = function(){