I am using ajax to receive data from php server. The data is received in json format. To display this data I am creating dynamic divs with unique ids. I have appended the dynamic divs in an already structured html.
Now while spitting out the data using ("#"+dynamicid).html("data"), I am unable to get the desired output.
Here's the code:
$.ajax({
url: "loader.php",
dataType: "json",
success: function(data) {
var i = "kmapN"+data.id;
$('<div class="kmapName">').append($('<div id="'+ i +'">'))
.append($('</div></div>'))
.appendTo('.new_content');
$("#"+i).html(data.kname);
}
});
Here's the json output from the server:
{"id":2,"kname":"This is the title!"}
Edit1:
If I don't use the dynamic id, I am getting the result. The problem is therefore in generating and accessing the dynamic id.
Edit2:
The idea here is to prevent javascript and html injection attacksby using ("#" + id).html("output") function of jquery.
Try this one
$('.kmapName').append('--Output you want to be rendered ---');
your dataType must be defined.
create your dynamic div and append the variable to the main div
.ajax({
url: "loader.php",
dataType:'json',
success: function(data) {
var i = "kmapN"+data.id;
var new_div ='<div class="kmapName"><div id="'+ i +'">'+ data.kname +'</div></div>';
$(".new_content").append(new_div);
}
});
Related
The idea is to fetch the content from an external PHP file on Page load using jQuery .each() function. The problem is the page freezes or keeps on loading and never ends. What would be the issue?
PHP Page
<div class='caller-div-holder'>
<div class='calling-div' id='calling-div-1'></div>
<div class='calling-div' id='calling-div-2'></div>
<div class='calling-div' id='calling-div-3'></div>
</div>
In the .js file
$('.calling-div').each(function()
{
var fetch_id=$(this).attr('data-id');
$.ajax(
{
type: "POST",
url: "page-url",
data: {var1: fetch_id},
dataType:"html",
success: function(data)
{
$('#calling-div-'+fetch_id).html(data);
}
}); // Ajax
}); // Each function
Note:
Instead of $.ajax() on using document.write I found that the function is called for 3 times correctly with the variable fetch_id getting the data properly.
The external PHP page is checked with sample data just changing the POST to GET and passing the data through GET method. It works.
Edit 1:
Adding async:"false", reduces the problem intensity. But still the page is considerably slow.
The following will solve the issue by adding all the html at once, this will be faster than the other method...it will still lock the DOM at the end when it adds the html variable to the html of the parent element.
var html = '';
$('.calling-div').each(function()
{
var fetch_id=$(this).attr('data-id');
$.ajax(
{
type: "POST",
url: "page-url",
data: {var1: fetch_id},
dataType:"html",
success: function(data)
{
html += "<div class='calling-div' id='calling-div-" + fetch_id + "'>" + data + "</div>"
}
}); // Ajax
}); // Each function
$('.caller-div-holder').html(html);
Special Note I highly recommend using the following to solve this problem:
jQuery append() for multiple elements after for loop without flattening to HTML
http://jsperf.com/fn-append-apply
I'm not sure if there is any way to do this or not, but this would solve so many of my problems if there is a simple solution to this.
What I need/want to be able to do is return HTML and JSON in my success of ajax request. The reason being, I want to request a file and return all of that page, but I also want to be able to return a specified set of information from the page in json, so I can use it for other things.
This is what I'm doing now:
$.ajax({
type: "POST",
url: "inc/"+page+".php",
data: "id="+encodeURIComponent(pageID),
success: function(html){
$("body > .container").html(html);
}
});
This is what I'd like to be able to do:
$.ajax({
type: "POST",
url: "inc/"+page+".php",
data: "id="+encodeURIComponent(pageID),
success: function(html){
$("body > .container").html(html);
$("title").html(json.PageTitle)
}
});
on the page that is being returned, I would specify what I want the title to be. (For instance, if it's a profile, I would return the user's name)
HTML and data wrapped in JSON
You can do it by returning a 2 element JSON array.
The first element contains HTML and the second element contains another JSON array with the data inside. You just need to unwrap it carefully without breaking anything.
Serverside
$html = '<div>This is Html</div>';
$data = json_encode(array('page_title'=>'My Page'));
$response = array('html'=>$html, 'data'=>$data);
echo json_encode($response);
Clientside
//Ajax success function...
success: function(serverResponse){
$("body > .container").html(serverResponse.html);
var data = JSON.parse(serverResponse.data);
$("title").html(data.page_title)
}
Note 1: I think this is what #hakre meant in his comment on your question.
Note 2: This method works, but I would agree with #jheddings that its probably a good idea to avoid mixing presentation and data. Coding karma will come back to bite.
Trying to mix the retun value to contain presentation and data seems like a potential for confusion. Why not split it into two calls and fetch the data on success of the other?
Something like:
$.ajax({
type: "POST",
url: "inc/"+view_page+".php",
data: "id="+encodeURIComponent(pageID),
success: function(html) {
$("body > .container").html(html);
$.ajax({
type: "POST",
url: "inc/"+data_page+".php",
data: "id="+encodeURIComponent(pageID),
success: function(json) {
$("title").html(json.PageTitle);
}
});
});
You also have the option of including the data in html5 data attributes
For instance, if you're returning a list of Animals
<ul id="ZeAnimals" data-total-animals="500" data-page="2">
<li>Cat</li>
<li>Dog</li>
...
</ul>
You can then collect the data you require using
$('#ZeAnimals').data('total-animals')
Sometimes separating your request into two different ajax calls makes sense also.
You may use a library that does that automatically, like http://phery-php-ajax.net. Using
Phery::instance()->set(array(
'load' => function(){
/* mount your $html and $json_data */
return
PheryResponse::factory()
->json($json_data)
->this() // points to the container
->html($html);
}
))->process();
$(function(){
var $container = $('body > .container');
$container.phery('make', 'load'); // or $container.phery().make('load')
$container.bind('phery:json', function(event, data){
// deal with data from PHP here
});
$container.phery('remote');
});
You may, as well, use phery.views to automatically load a portion of the site automatically, without having to worry about client-side specific code. You would have to put a unique ID on the container, container in this example:
$(function(){
phery.view({
'#container': {}
});
});
Phery::instance()->views(array(
'#container' => function($data, $params){
/* do the load part in here */
return
PheryResponse::factory()
->render_view($html)
->jquery('.title')->text($title);
}
))->process();
I have a simple load more style script that works fine on the index page, where only one parameter is sent via ajax
$(function() {//When the Dom is ready
$('.load_more').live("click",function() {//If user clicks on hyperlink with class name = load_more
var last_msg_id = $(this).attr("id");//Get the id of this hyperlink this id indicate the row id in the database
if(last_msg_id!='end'){//if the hyperlink id is not equal to "end"
$.ajax({//Make the Ajax Request
type: "POST",
url: "index_more.php",
data: "lastmsg="+ last_msg_id,
beforeSend: function() {
$('a.load_more').html('<img src="loading.gif" />');//Loading image during the Ajax Request
},
success: function(html){//html = the server response html code
$("#more").remove();//Remove the div with id=more
$("ul#updates").append(html);//Append the html returned by the server .
}
});
}
return false;
});
});
With this HTML/PHP
<div id="more">
<a id="<?php echo $msg_id; ?>" class="load_more" href="#">more</a>
</div>
However, I want to add another php variable so that it can also work with particular categories, I have no problems writing the HTML and PHP but I am new to Jquery and struggling to edit the script to include the additional parameter if it is set. This is the HTML that I am thinking of using, just struggling with editing the JQuery
<div id="more"class="<?php echo $cat_id;?>">
<a id="<?php echo $msg_id;?>" class="load_more2" href="#">more</a>
</div>
As always any help is much appreciated!
You can set
data = {onevar:'oneval', twovar:'twoval'}
And both key/value pairs will be sent.
See Jquery ajax docs
If you look under the data section, you can see that you can pass a query string like you are, an array, or an object. If you were to use the same method you already are using then your data value would be like "lastmsg="+ last_msg_id + "&otherthing=" + otherthing,
You can pass multiple URL params in the data portion of your ajax call.
data: "lastmsg="+ last_msg_id +"&otherparam="+ other_param
On the PHP side, you'd just process these as you already are.
You can use this code:
$.ajax({//Make the Ajax Request
type: "POST",
url: "index_more.php",
data: {var1: "value1", var2: "value2"},
beforeSend: function() {
$('a.load_more').html('<img src="loading.gif" />');//Loading image during the Ajax Request
},
success: function(html){//html = the server response html code
$("#more").remove();//Remove the div with id=more
$("ul#updates").append(html);//Append the html returned by the server .
}
});
Try It:
data: JSON.stringify({ lastmsg: last_msg_id, secondparam: second_param_value});
You can add more parameters separating them by comma (,).
I have this for loop in jquery
$(document).ready(function() {
for(i=0; i<counter; i++)
{
dataCounter = i;
$.ajax({
url: 'file.php',
dataType: 'json',
data: dataCounter,
error: function(){
alert('Error loading XML document');
},
success: function(data){
$("#contents").html(data);
}
});
}
});
And then I want to bring in my dataCounter into the file.php as a variable and have it change each time so I can get different records in mysql in file.php, am I doing this right? How would the php portion look like? I know how pass variables to a php file with this method if I had a form, but I don't have a get or a post form to work with. Also, my variables are going to change.
Can someone help me? Thank you!
While I don't recommend running an ajax query inside of a loop, I am wiling to explain the data option for $.ajax(). Ideally, you pass an object as the data option, and it is translated by jQuery into a query string where each object property name is a key and its value is the value:
data: {
count: dataCounter
}
becomes
?count=1
in the query string of the ajax request if datacounter is equal to 1.
In PHP you would access it as $_GET['count'].
data needs to be a key-value pair, not just a value as you have it here. Try something like: (not tested)
$.ajax({
url: 'file.php',
dataType: 'json',
data: ({dataCounter : dataCounter}),
error: function(){
alert('Error loading XML document');
},
success: function(data){
$("#contents").html(data);
}
});
I'm trying to take values from a dropdown two boxes and send them to a PHP file which will draw an appropriate field from a mySQL database depending on the combination chosen and display it in a div without refreshing the page using AJAX. I have the second part sorted, but I'm stuck on the first part.
Here is the HTML: http://jsfiddle.net/SYrpC/
Here is my Javascript code in the head of the main document:
var mode = $('#mode');
function get() {$.post ('data.php', {name: form.him.value, the_key: #mode.val()},
function(output) {$('#dare').html(output).show();
});
}
My PHP (for testing purposes) is:
$the_key = $_POST['the_key'];
echo $the_key;
After I have it in PHP as a variable I can manipulate it, but I'm having trouble getting it there. Where am I going wrong? Thanks for your replies!
You need a callback function as well to have the server response to the POST.
$.post('ajax/test.html', function(data) {
$('.result').html(data);
});
This snippet will post to ajax/test.html and the anonymous function will be called upon its reply with the parameter data having the response. It then in this anonymous function sets the class with result to have the value of the server response.
Help ? Let me know and we can work through this if you need more information.
Additionally, $.post in jQuery is a short form of
$.ajax({
type: 'POST',
url: url,
data: data,
success: success
dataType: dataType
});
your jquery selectors are wrong:
html:
<select id="mode">
jquery selector:
$("#mode").val();
html:
<select name="player">
jquery selector:
$("select[name=player]").val();
You want to add a callback to your ajax request, its not too hard to do, here ill even give you an example:
$.ajax({
url: "http://stackoverflow.com/users/flair/353790.json", //Location of file
dataType: "josn",//Type of data file holds, text,html,xml,json,jsonp
success : function(json_data) //What to do when the request is complete
{
//use json_data how you wish to.;
},
error : function(_XMLHttpRequest,textStatus, errorThrown)
{
//You fail
},
beforeSend : function(_XMLHttpRequest)
{
//Real custom options here.
}
});
Most of the above callbacks are optional, and in your case i would do the following:
$.ajax({
url: "data.php",
dataType: "text",
data : {name: ('#myform .myinput').val(),the_key: $('#mode').val()},
success : function(value)
{
alert('data.php sent back: ' + value);
}
});
the ones you should always set are url,success and data if needed, please read The Documentation for more information.