Develop Reference

Ajax function in javascript is not working in mozilla firefox browser, why?

Follownig is my javascript code, ajax function is used to read response from
server. but xmlhttp.status is always 0 in firefox browser, why? please help me.
function ajaxAsyncRequest() {
var xmlhttp;
if (window.XMLHttpRequest) {
xmlhttp = new XMLHttpRequest();
} else {
xmlhttp = new ActiveObject("Microsoft.XMLHTTP");
}
//creating asynchrounous GET request
var tempValUrl = $(".urlVal").val();
var urls = tempValUrl + '/Department/departmentAdminTokenReceive';
xmlhttp.open("GET", urls, true);
xmlhttp.send();
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4) {
alert("readyState"+xmlhttp.readyState);
alert("status"+xmlhttp.status);
if (xmlhttp.status == 200) {
var data = xmlhttp.responseText;
//for signing
var signarr = data.split("$$");
//for signing
document.getElementById('signName').value = signarr[1];
document.getElementById('signCertName').value = signarr[2];
document.getElementById('signCa').value = signarr[3];
document.getElementById('signExpiryDate').value = signarr[4];
document.getElementById('signPublicKey').value = signarr[5];
}
}
}
}

How can Variable and that value move freely in the cycle of PHP->HTML->JS->PHP

I am adding the comments input box of every XML-RSS article.
When I select a RSS url, that results are commonly as below
PHP code
for ($i=0; $i<=19; $i++) {
$item_title=$x->item($i)->getElementsByTagName('title')
->item(0)->childNodes->item(0)->nodeValue;
$item_link=$x->item($i)->getElementsByTagName('link')
->item(0)->childNodes->item(0)->nodeValue;
$item_desc=$x->item($i)->getElementsByTagName('description')
->item(0)->childNodes->item(0)->nodeValue;
$item_date=$x->item($i)->getElementsByTagName('pubDate')
->item(0)->childNodes->item(0)->nodeValue;
echo ("<p><a href='" . $item_link
. "' target=\'_blank\'>" . $item_title . "</a>");
echo ("<br>");
echo ($item_desc . "<br>".$item_date."</p>");
$item_link1 = str_replace('http://','',$item_link);
$item_link2 = str_replace('https://','',$item_link1);
$item_link3 = str_replace('/','-',$item_link2);
$item_link4 = str_replace('?','-',$item_link3);
$content = $item_title."--". $item_link."--".$item_desc."--".$item_date;
file_put_contents("./comments/".$item_link4.".txt",$content);
//Next line is something wrong or not??
echo "<option id=".$item_link4." onclick=\"showComment(this.value)\" value=".$item_link4."> Show Comments </option> <div id=\"".$item_link."\"></div>";
Next, I can see the results as a below picture.
And I am coding JS which has the showComment function as below.
function showComment(str) {
if (str.length == 0) {
document.getElementById(""+item_link4+"").innerHTML = "";
return;
} else {
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
document.getElementById(""+item_link4+"").innerHTML = this.responseText;
}
};
var q = document.getElementById(""+item_link4+"").value;
xmlhttp.open("GET", "showComment.php?q=" + q, true);
xmlhttp.send();
}
}
And Next, I am coding the showComment.php as below to see the 'q' value.
But,
Notice: Undefined index: q in E:\xampp\htdocs\code\v1\showComment.php on line 5.
The first part is like next.
// line 5 is $q = html...
$q = htmlspecialchars($_GET['q']);
global $result;
echo $q;
Eventually, I got something wrong in JS code which received item_link4
How do I change the JS variable originated from php-HTML code?
Please your Kindness.

I have tried so many times. At last I got the good result for going to the better.
PHP code is
echo " <option id=".$i." onclick=\"showComment".$i."(this.value)\" value=".$item_link4."> Show Comments </option>";
And I changed JS code as below.
<script>
function showComment0(str) {
if (str.length == 0) {
document.getElementById("0").innerHTML = "";
return;
} else {
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
document.getElementById("0").innerHTML = this.responseText;
}
};
var q = document.getElementById("0").value;
xmlhttp.open("GET", "showComment.php?q=" +q, true);
xmlhttp.send();
}
}
</script>
....
<script>
function showComment22(str) {
if (str.length == 0) {
document.getElementById("22").innerHTML = "";
return;
} else {
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
document.getElementById("22").innerHTML = this.responseText;
}
};
var q = document.getElementById("22").value;
xmlhttp.open("GET", "showComment.php?q=" +q, true);
xmlhttp.send();
}
}
</script>
<script>
function showComment23(str) {
if (str.length == 0) {
document.getElementById("23").innerHTML = "";
return;
} else {
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
document.getElementById("23").innerHTML = this.responseText;
}
};
var q = document.getElementById("23").value;
xmlhttp.open("GET", "showComment.php?q=" +q, true);
xmlhttp.send();
}
}
</script>
So I made Id 0 to 18 script. That is, 19 scripts are necessary.
I am waiting for better answer.

How to get data from PHP in JSON and AJAX?

Hey guys I am fetching some data with PHP with is listing the folders and Inside the folders I have some images. But I am willing to know how can I get that data in JSON with AJAX to get the name of folders in a DropDown.
This is the code that I am using
JS
<html>
<head>
<script type="text/javascript">
function getXmlHttp(){
var xmlhttp;
try {
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (E) {
xmlhttp = false;
}
}
if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
xmlhttp = new XMLHttpRequest();
}
return xmlhttp;
}
function readDir(dirName) {
var req = getXmlHttp();
var list = document.getElementById('subDir');
req.onreadystatechange = function() {
if (req.readyState == 4) {
if(req.status == 200) {
list.innerHTML = req.responseText;
}
}
}
req.open('GET', 'getList.php?data=' + dirName, true);
req.send(null);
list.innerHTML = 'loading...';
}
</script>
</head>
<body onload="readDir('');">
<div id="subDir">
</div>
</body>
</html>
PHP
<?php
$dir = "./data/";
if (strlen($_GET['data']) > 0){$dir = $_GET['data'];}
getList($dir);
function getList($name) {
$path = realpath($name);
$objects = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path, FilesystemIterator::SKIP_DOTS), RecursiveIteratorIterator::CATCH_GET_CHILD);
foreach($objects as $name => $object){
if (filetype($name) == "dir") {
print "<br/><a href='javascript:void' onClick='readDir(\"" . $path . "/" . basename($name) . "\")'><b>" . basename($name) . "</b></a>";
} else {
print "<br/><a><b>" . basename($name) . "</b></a>";
}
}
}
?>
Here you can see the code how is working: http://tdhdemo.com/phpfetch/

I'm not sure I get your question right but you can add your list to an array in PHP and display it using json_encode.
When receiving data from the ajax call, use JSON.parse to make it easily readable.
You can also separate files and folders if you want to use them in the future.
<?php
$dir = "./data/";
if (strlen($_GET['data']) > 0){$dir = $_GET['data'];}
echo json_encode(getList($dir));
function getList($name) {
$path = realpath($name);
$objects = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path, FilesystemIterator::SKIP_DOTS), RecursiveIteratorIterator::CATCH_GET_CHILD);
$folderContent = array("directories" => array(), "files" => array());
foreach($objects as $name => $object){
if (filetype($name) == "dir") {
array_push($folderContent["directories"], basename($name));
} else {
array_push($folderContent["files"], basename($name));
}
}
return $folderContent;
}
?>
Javascript :
function readDir(dirName) {
var req = getXmlHttp();
var list = document.getElementById('subDir');
req.onreadystatechange = function() {
if (req.readyState == 4) {
if(req.status == 200) {
contentList = JSON.parse(req.responseText);
for(i in contentList["directories"]){
list.innerHTML = list.innerHTML + contentList["directories"][i];
}
}
}
}
req.open('GET', 'getList.php?data=' + dirName, true);
req.send(null);
list.innerHTML = 'loading...';
}

JS file works fine on IE but not on other browsers

The function below gets results in ie but not on the other browsers. Any suggestion?
function show_packet(str, company) {
var cam = document.getElementById("company");
if (window.XMLHttpRequest) {
var xmlhttp = new XMLHttpRequest();
} else {
var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
document.getElementById("packet_1").innerHTML = xmlhttp.responseText;
document.getElementById("icon_1").innerHTML = "";
}
}
xmlhttp.open("GET", "show_packet.php?car_moto=" + encodeURIComponent(str, true) + "&cam=" + encodeURIComponent(cam.value, true));
xmlhttp.send();
}

vars and functions are hoisted to the top of their containing function. Declare your var once at the top, and only assign it in the if/else.

problem in javascript

i have sorted xml file on the basis of item no.now i am trying to display data in javascript, but my code doesn't work, can anybody tell me what is wrong here
item.php:
$xmlFile = "items.xml";
$doc= DOMDocument::load($xmlFile);
$item = $doc->getElementsByTagName("item");
$items=array();
foreach($item as $node)
{
$itemno = $node->getElementsByTagName("itemno");
$itemno = $itemno->item(0)->nodeValue;
$quantity = $node->getElementsByTagName("quantity");
$quantity = $quantity->item(0)->nodeValue;
$available = $node->getElementsByTagName("available");
$available = $available->item(0)->nodeValue;
$items[$itemno]= array($itemno,$quantity,$available);
}
ksort($items, SORT_NUMERIC);
foreach($item AS $ite => $no)
{
$itemnum=$no[0];
$qty=$no[1];
$avail=$no[2];
echo $itemnum;
echo $qty;
echo $avail;
}
js:
var xhr = createRequest();
function getit( ) {
xhr.open("GET", 'item.php', true);
xhr.onreadystatechange = getConfirm;
xhr.send(null);
}
function getConfirm()
{
if ((xhr.readyState == 4) &&(xhr.status == 200))
{
var data = xhr.responseText;
alert(data);
}
}

try xmlrequest in this flow in your javascript:
var xmlhttp;
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("tbRow").innerHTML=xmlhttp.responseText;
//lo();
}
}
xmlhttp.open("GET","tbrow.php",true);
xmlhttp.send();
Here "tbRow" is a "div" id. i.e.,
<div id="tbRow"></div>