Develop Reference

How can I call ajax array passed from php json encode? zend framework 2

I can't call an arrays passed from the php json encode. I would concatenate 2 select state-contry-city. How can I do this??
This is the code:
I have 2 selects. I send the first value to an action:
php action into my controller:
public function regioniProvinceComuniAction(){
$response = $this->getResponse();
$request = $this->getRequest();
if ($request-> isPost()){
$post_data = $request->getPost();
$regione = (int)$post_data['regione'];
$province = (int)$post_data['province'];
}
if(isset($regione)){
$prov = $this->getProvincia($regione);
}
if(isset($province)){
$com = $this->getComuni($province);
}
$response->setContent(\Zend\Json\Json::encode(array('prov' => $prov, 'com' => $com)));
return $response;
}
This is my js file:
$("select#Regione").change(function () {
var regione = $("select#Regione option:selected").attr('value');
$.ajax({
type: 'POST',
url: '/zf-tutorial/public/regioni-province-comuni',
datatype: 'json',
data: { regione: regione },
success: function (data) {
alert (data);
}
});
});
An example of the alert function is like this:
{"prov":[{"id":"10","nome":"Genova"},{"id":"8","nome":"Imperia"},{"id":"11","nome":"La Spezia"},{"id":"9","nome":"Savona"}],"com":[]}
I tried to populate my second select via data.post like this, but the values are "undefined":
success: function (data) {
$('select#Provincia option').each(function(){$(this).remove()});
for(var i=0; i<data.length; i++){
$("select#Provincia").append('<option value="' + data[i].prov.id + '">' + data[i].prov.nome + '</option>');
}
i tried to do
for (var i = 0; i < data.prov.length; i++) {
$("select#Provincia").append('<option value="' + data.prov[i].id + '">' + data.prov[i].nome + '</option>');
}
if i set manually the var data, works fine, but with the response data doesn't work. i tried to do:
var prov = data.prov;
$("div#id").html(prov);
but it doesn't work. works only like this:
$("div#id").html(data);
and the output is the same
{"prov":[{"id":"10","nome":"Genova"},{"id":"8","nome":"Imperia"},{"id":"11","nome":"La Spezia"},{"id":"9","nome":"Savona"}],"com":[]}

You need to loop through the items in data.prov. Change your for loop to this:
for (var i=0; i<data.prov.length; i++){
$("select#Provincia").append('<option value="' + data.prov[i].id + '">' + data.prov[i].nome + '</option>');
}
jsFiddle Demo
EDIT
Solution found in comments: Can you try to change datatype in your $.ajax() call to dataType. I'm not sure if the case is important. Sounds like data is a string and not an object

Implement jQuery on dynamically created elements

I'm trying to integrate two jQuery scripts into one but because the elements of the first part are created dynamically using jQuery I can't get the second part of the project working.
The project:
1.Instagram pictures are parsed as JSON into li elements.
Here's a portion of the code:
<ul id="elasticstack" class="elasticstack">
</ul>
<script>
$("#elasticstack").append("<li><div class='peri-pic'><img class='instagram-image' src='" + data.data[i].images.low_resolution.url +"' /><span class='name'>"+ data.data[i].caption.from.username +"</span> <span class='likes'><span class='glyphicon glyphicon-heart'></span><p>"+data.data[i].likes.count +"</p></span></div></li>"
);
</script>
Source: LINK
2.This works fine but when I try to add the slider none of the functions work. Even if I wrap the callout function in a $( document ).ready(function() { });
Here's the call out code:
<script>
new ElastiStack( document.getElementById( 'elasticstack' ) );
</script>
Source: LINK
Here's the JS Fiddle with all my code: LINK
Where am I going wrong?

You're looking for this. After the initial loadImages(start_url) call, you should be able to call loadImages(next_url) to load and display more. new ElastiStack had to be called after the images had been appended.
var access_token = "18360510.5b9e1e6.de870cc4d5344ffeaae178542029e98b",
user_id = "18360510", //userid
start_url = "https://api.instagram.com/v1/users/"+user_id+"/media/recent/?access_token="+access_token,
next_url;
function loadImages(url){
$.ajax({
type: "GET",
dataType: "jsonp",
cache: false,
url: url,
success: function(data){
displayImages(data);
next_url = data.pagination.next_url;
}
})
}
function displayImages(images){
for(var i = 0; i < 20; i++){
if(images.data[i]){
$("#elasticstack").append("<li><img class='instagram-image' src='" + images.data[i].images.low_resolution.url + "'></li>");
}
}
// Call it after the images have been appended
new ElastiStack(document.getElementById('elasticstack'));
}
$(document).ready(function(){
loadImages(start_url);
});

Try to initialize the ElastiStack after data (HTML elements) has been appended into the DOM in your ajax, for example:
for (var i = 0; i < count; i++) {
// ...
$("#elasticstack").append(...);
}
new ElastiStack(...);
It should work.

$.ajax({
type: "GET",
dataType: "jsonp",
cache: false,
url: url ,
success: function(data) {
next_url = data.pagination.next_url;
//count = data.data.length;
//three rows of four
count = 20;
//uncommment to see da codez
//console.log("count: " + count );
//console.log("next_url: " + next_url );
//console.log("data: " + JSON.stringify(data) );
for (var i = 0; i < count; i++) {
if (typeof data.data[i] !== 'undefined' ) {
//console.log("id: " + data.data[i].id);
$("#elasticstack").append("<li><img class='instagram-image' src='" + data.data[i].images.low_resolution.url +"' /></li>"
);
}
}
new ElastiStack(document.getElementById('elasticstack'));
}
});
You have to move your new ElastiStack(document.getElementById('elasticstack')); inside the ajax success event. You don't have to change anything else in your. I also updated your JSFiddle.

How to get the value value of a button clicked Javascript or Jquery

I'll try to be as straight to the point as I can. Basically I using jquery and ajax to call a php script and display members from the database. Next to each members name there is a delete button. I want to make it so when you click the delete button, it deletes that user. And that user only. The trouble I am having is trying to click the value of from one delete button only. I'll post my code below. I have tried alot of things, and right now as you can see I am trying to change the hash value in the url to that member and then grap the value from the url. That is not working, the value never changes in the URL. So my question is how would I get the value of the member clicked.
<script type="text/javascript">
$(document).delegate("#user_manage", "pagecreate", function () {
$.mobile.showPageLoadingMsg()
var friends = new Array();
$.ajaxSetup({
cache: false
})
$.ajax({
url: 'http://example.com/test/www/user_lookup.php',
data: "",
dataType: 'json',
success: function (data) {
$.mobile.hidePageLoadingMsg();
var $member_friends = $('#user_list');
$member_friends.empty();
for (var i = 0, len = data.length; i < len; i++) {
$member_friends.append("<div class='user_container'><table><tr><td style='width:290px;font-size:15px;'>" + data[i].username + "</td><td style='width:290px;font-size:15px;'>" + data[i].email + "</td><td style='width:250px;font-size:15px;'>" + data[i].active + "</td><td><a href='#" + data[i].username + "' class='user_delete' data-role='none' onclick='showOptions();'>Options</a></td></tr><tr class='options_panel' style='display:none'><td><a href='#" + data[i].username + "' class='user_delete' data-role='none' onclick='showId();'>Delete</a> </td></tr></table></div>");
}
}
});
});
</script>
<script>
function showId() {
var url = document.URL;
var id = url.substring(url.lastIndexOf('#') + 1);
alert(id);
alert(url);
}
</script>

IDEAS:
1st: I think it would be easier to concatenate an string an later append it to the DOM element. It's faster.
2nd: on your button you can add an extra attribute with the user id of the database or something and send it on the ajax call. When getting the attribute from the button click, use
$(this).attr('data-id-user');

Why don't you construct the data in the PHP script? then you can put the index (unique variable in the database for each row) in the button onclick event. So the delete button would be:
<button onclick = "delete('indexnumber')">Delete</button>
then you can use that variable to send to another PHP script to remove it from the database.

$('body').on('click', 'a.user_delete', function() {
var url = document.URL;
var id = url.substring(url.lastIndexOf('#') + 1);
alert(id);
alert(url);
});

<?php echo $username ?>
Like wise if you pull down users over json you can encode this attribute like so when you create your markup in the callback function:
'<a href="#'+data[i].username+'" data-user-id="'+ data[i].username + '" class="user_delete" data-role="none" >Options</a>'
So given what you are already doing the whole scenerio should look something like:
$(document).delegate("#user_manage", "pagecreate", function () {
$.mobile.showPageLoadingMsg();
var friends = new Array(),
$member_friends = $('#user_list'),
// lets jsut make the mark up a string template that we can call replace on
// extra lines and concatenation added for readability
deleteUser = function (e) {
var $this = $(this),
userId = $this.attr('data-id-user'),
href = $this.attr('href'),
deleteUrl = '/delete_user.php';
alert(userId);
alert(href);
// your actual clientside code to delete might look like this assuming
// the serverside logic for a delete is in /delete_user.php
$.post(deleteUrl, {username: userId}, function(){
alert('User deleted successfully!');
});
},
showOptions = function (e) {
$(this).closest('tr.options_panel').show();
},
userTmpl = '<div id="__USERNAME__" class="user_container">'
+ '<table>'
+ '<tr>'
+ '<td style="width:290px;font-size:15px;">__USERNAME__</td>'
+ '<td style="width:290px;font-size:15px;">__EMAIL__</td>'
+ '<td style="width:250px;font-size:15px;">__ACTIVE__</td>'
+ '<td>Options</td>'
+ '</tr>'
+ '<tr class="options_panel" style="display:none">'
+ '<td>Delete</td>'
+ '</tr>'
+ <'/table>'
+ '</div>';
$.ajaxSetup({
cache: false
})
$(document).delegate('#user_manage #user_container user_options', 'click.userlookup', showOptions)
.delegate('#user_manage #user_container user_delete', 'click.userlookup', deleteUser);
$.ajax({
url: 'http://example.com/test/www/user_lookup.php',
data: "",
dataType: 'json',
success: function (data) {
$.mobile.hidePageLoadingMsg();
var markup;
$member_friends.empty();
for (var i = 0, len = data.length; i < len; i++) {
markup = userTmpl.replace('__USERNAME__', data[i].username)
.replace('__ACTIVE__', data[i].active)
.replace('__EMAIL__', data[i].email);
$member_friends.append(markup);
}
}
});
});

Here's a really simple change you could make:
Replace this part:
onclick='showId();'>Delete</a>
With this:
onclick='showId("+data[i].id+");'>Delete</a>
And here's the new showId function:
function showId(id) {
alert(id);
}

Array and while loop: make unique clickable

I have an array (via ajax) that looks like this:
data[i].id: gives the id of user i
data[i].name: gives the name of user i
I want to output the array like this:
X Leonardo Da Vinci
X Albert Einstein
X William Shakespeare
...
The X is an image (x.gif) that must be clickable. On click, it must go to functiontwo(), passing the parameter data[i].id. Functiontwo will open a jquery dialog with the question "Delete id data[i].id"?
I know this can't be too hard to do, but I can't seem to figure it out...
This is what I have so far:
function functionone() {
$.ajax({
type : 'POST',
url : 'post.php',
dataType : 'json',
success : function(data){
var message = "";
var i = 0;
while (i < (data.length - 1))
{
var myvar = data[i].id;
message = message + "<div class=" + data[i].id + "><img src=x.gif></div>" + data[i].name + "<br />";
$('#somediv').html(message).fadeIn('fast');
$("." + data[i].id + "").click(function () {
functiontwo(myvar);
});
i++;
}
}
});
}
function functiontwo(id) {
...}
I know why this isn't working. Var i gets populated again and again in the while loop. When the while loop stops, i is just a number (in this case the array length), and the jquery becomes (for example):
$("." + data[4].id + "").click(function () {
functiontwo(myvar);
});
, making only the last X clickable.
How can I fix this?
Thanks a lot!!!
EDIT:
This is my 2nd function:
function functiontwo(id) {
$("#dialogdelete").dialog("open");
$('#submitbutton').click(function () {
$('#submitbutton').hide();
$('.loading').show();
$.ajax({
type : 'POST',
url : 'delete.php',
dataType : 'json',
data: {
id : id
},
success : function(data){
var mess = data;
$('.loading').hide();
$('#message').html(mess).fadeIn('fast');
}
});
//cancel the submit button default behaviours
return false;
});
}
In delete.php there's nothing special, I used $_POST['id'].

As I pointed out in my comment. The problem is the .click part. Either use bind, or use a class for all the elements, and a click-event like this $('.classnamehere').live('click',function () { // stuff });

function functionone() {
$.ajax({
type : 'POST',
url : 'post.php',
dataType : 'json',
success : function(data){
var message = "";
var i = 0;
while (i < (data.length - 1))
{
var myvar = data[i].id;
message = message + "<div class=\"clickable\" id=" + data[i].id + "><img src=x.gif></div>" + data[i].name + "<br />";
$('#somediv').html(message).fadeIn('fast');
i++;
}
}
});
}
$('.clickable').live('click',function () {
alert($(this).attr('id') + ' this is your ID');
});

The usual trick is create a separate function to create the event handler. The separate function will receive i as a parameter and the generated event will be able to keep this variable for itself
make_event_handler(name){
return function(){
functiontwo(name);
};
}
...
$("." + data[i].id + "").click( make_event_handler(myvar) );

Using Ajax callback variable values in JQuery dynamic click handlers

I'm doing a simple ajax query which retrieves a variable-length list of values as JSON data. I'm trying to make a list based on this data which has click-functions based on the values I got from the JSON query. I can make this work just fine by writing the onClick-methods into the HTML like this:
function loadFooList() {
var list_area = $("#sidebar");
list_area.html("<ul>")
$.ajax({
type: 'GET',
url:'/data/foo/list',
dataType: 'json',
success: function (json) {
$.each(json, function(i, item) {
var link_id = "choosesfoo" + item.id;
list_area.html(list_area.html()
+ "<li> <a href='#' onClick='alert(\"" +
link_id + "\");'>" +
item.name + "</a></li>");
});
list_area.html(list_area.html() + "</ul>");
}
});
}
I don't like writing the onClick-function into the HTML and I also want to learn how to create this same functionality via JQuery click-function.
So the problem is obviously variable-scoping. My naive attempt here obviously won't work because the variables are no longer there when the click happens:
function loadFooList2() {
var list_area = $("#sidebar");
var link_ids = Array();
list_area.html("<ul>")
$.ajax({
type: 'GET',
url:'/data/foo/list',
dataType: 'json',
success: function (json) {
$.each(json, function(i, item) {
var link_id = "choosefoo" + item.id;
list_area.html(list_area.html()
+ "<li> <a href='#' id='" + link_id + "'>"+item.name+"</a></li>");
link_ids.push(link_id);
});
list_area.html(list_area.html() + "</ul>");
for (link_index=0; link_index<link_ids.length; link_index++) {
$("#" + link_ids[link_index]).click(function() {
alert(link_ids[i]);
});
}
}
});
}
Obviously I'd like to do something else than just alert the value, but the alert-call is there as long as I can get that working and move forward.
I understand that I'll have to make some kind of handler-function to which I pass a state-variable. This works for a single value (I can store the whole link_ids array just fine, but then I don't know which of them is the right value for this link), but how would I do this for arbitrary-length lists?
Here is an example from JQuery docs which I'm trying to copy:
// get some data
var foobar = ...;
// specify handler, it needs data as a paramter
function handler(data) {
//...
}
// add click handler and pass foobar!
$('a').click(function(){
handler(foobar);
});
// if you need the context of the original handler, use apply:
$('a').click(function(){
handler.apply(this, [foobar]);
});
And I quess the last example here, "if you need the context of the original handler..." would probably be what I want but I don't know exactly how to get there. I tried to store the current link_id value into this, use it from this in the applied function (using apply()) but I didn't succeed. The necessary values were still undefined according to FireFox. I'm using JQuery 1.3.2.
So what's the right solution for this relatively basic problem?

Use append instead of html():
function loadFooList() {
var ul = $('<ul>');
$.ajax({
type: 'GET',
url:'/data/foo/list',
dataType: 'json',
success: function (json) {
$.each(json, function(i, item) {
var link_id = "choosesfoo" + item.id;
var a = $('<a>').attr('href','#').bind('click', function(e) {
alert(link_id,item_name);
e.preventDefault();
});
$('<li>').append(a).appendTo(ul);
});
ul.appendTo('#sidebar'); // this is where the DOM injection happens
}
});
}

So the problem appears to be getting the link id associated with the link so that your click handler has access to it. Note that if it's alphanumeric it will qualify for the id attribute and you can extract it from there. If it is purely numeric, it will be an illegal id attribute. In that case, you can either use an attribute, like rel, or the jQuery.data() method to store the link id with the link. You can also simplify by using append. I'll show both examples.
var link = $("<li><a href='#' id='" + link_id + "'>" + item.name + "</a></li>";
link.click( function() {
alert( $(this).attr('id') );
});
list_area.append(link);
or (if numeric)
var link = $("<li><a href='#'>" + item.name + "</a></li>";
link.data('identifier', link_id )
.click( function() {
alert( $(this).data('identifier') );
});
list_area.append(link);

Try this:
function loadFooList() {
var list_area = $("#sidebar");
$.ajax({
type: 'GET',
url:'/data/foo/list',
dataType: 'json',
success: function (json) {
var out = '<ul>';
$.each(json, function(i, item) {
var link_id = "choosefoo" + item.id;
out +="<li><a href='#' id='" + link_id + "'>"+item.name+"</a></li>";
});
out +="</ul>"
var $out = $(out);
$out.find('a').click(function(){
var link_id = this.id;
var item_name = $(this).text();
alert(link_id);
alert(link_name);
})
list_area.html($out);
}
});
}
Using multiple appends causing the browser to redraw multiple times in a row. You only want to modify the dom once.