I didn't really know what to call this so I couldn't find anything by searching. Pretty much I have the following:
$(document).on('click', 'a[data-ajax]', function(e) {
var box = $('#ajaxdata');
e.preventDefault();
var r = $(this).attr('href');
$.ajax({
type: 'post',
url: '/betasite/' + r,
success: function(data) {
box.html(data);
}
});
});
Pretty much it loads the contents of a file (being some html) into a div so the page doesn't need to reload data as often. The problem is having is that I want to have some php inside that loaded file so I can access server side MySQL data and display it. Whenever I try to do this however, it comments the php out like <--php (stuff) -->. Does anyone know how I can work around that (like having the php generate the page before its loaded)?
Your php code will be rendered by server(WAMP/MAMP) automatically if you are on a local environment. If you are not running a server(WAMP/MAMP) you will have to select one depending on the O/S you use.
a good practice is to test the operation of the service in this case "php", before trying the operation in the front-end (jquery). If you have an Apache server up should see the result of their service by accessing the service route.
Related
I am doing a program in PHP (MVC) in which I need to delete a row from the database when I click on a link on the View side. So, when I click on the link, the following ajax function it is called.
var deleteCar = function(id)
{
$.ajax({
type: "POST",
url: "http://localhost/project/car/deleteCar/" + id,
success: function(response){
}
});
}
but I do not want to send any data so it is the reason why I put it as above.
Then, in the Controller side I have the following method:
public function deleteCar($id)
{
//Here I call the function to delete the Car that I send by id. It works fine.
header('Location: http://localhost/project/car');
}
If I call directly the method deleteCar on the link without Ajax the header works properly but in the same moment I use Ajax to call it, I have to refresh the page to see the content that I have modified, I mean, that the Car have been deleted.
The code works fine, just I do not want to refresh the page after AJAX function had finished.
Thanks in advance!
I am guessing the use case is to allow the app to work when the user does not have JS enabled - so they just click the links and get a non-AJAX experience. In this case you probably want to redirect ONLY if the page was requested via GET, not POST. something like
if ($_SERVER['REQUEST_METHOD'] === 'GET') {
header('Location: http://localhost/project/car');
}
is likely what you are looking for.
You will then have to actually remove the element representing the car from the DOM in your success handler, with something like:
var deleteCar = function(id)
{
$.ajax({
type: "POST",
url: "http://localhost/project/car/deleteCar/" + id,
success: function(response){
$('#car-row-' + id).remove();
}
});
}
(that won't be it exactly, it depends how the HTML of your page is setup how exactly you will do this).
I believe the key thing to understand here is - when your PHP function has completed it has removed the car from the database, but the browser still has the same HTML it got from the page originally. Just sending an AJAX request won't change that. If you want the HTML in the browser to change to reflect the new state of the database, you will NEED to do one of two things:
Refresh the page, so the entire thing is rebuilt by PHP based on the current database state
Use javascript to change the HTML in the browser, to reflect the changes you have made to the database state.
It is wrong on so many levels but it's difficult to put in words. It's subtle.
Long story short - think about jquery.ajax as of another virtual tab of you browser.
When you make ajax-request to the server - you create new virtual tab.
You php header could affect this virtual tab and redirect it where that header defined.
But it will redirect that virtual tab, not your current tab - if that makes sense.
What are your options? On success - make redirect with pure javascript.
success: function(response){
location.href = "http://localhost/project/car";
}
This would be the basic way to solve your problem.
i need a a script that will refresh the functions:
$ping, $ms
every 30 seconds, with a timer shown,
i basicly got this script:
window.onload=function(){
var timer = {
interval: null,
seconds: 30,
start: function () {
var self = this,
el = document.getElementById('time-to-update');
el.innerText = this.seconds;
this.interval = setInterval(function () {
self.seconds--;
if (self.seconds == 0)
window.location.reload();
el.innerText = self.seconds;
}, 1000);
},
stop: function () {
window.clearInterval(this.interval)
}
}
timer.start();
}
but it refreshes the whole page, not the functions i want it to refresh, so, any help will be appriciated, thanks!
EDIT:
I forgot to mention that the script has to loop infinatly
This here reloads the whole page:
window.location.reload();
Now what you seem to want to do is reload portions of the page, those portions having been generated by php functions. Unfortunately php is server side so that means you cant get the client browser to run php. Your server runs the php to generate stuff that browsers can understand. In a web browser open a page you made using php and choose to view source and you'll see what I mean.
Here's what you'll need to do:
Make your two functions ping and ms accessable via ajax
Instead of window.location.reload() do a call to jQuery.ajax. on success write to your page
Here's what I think would be the ideal way of dealing with this... I haven't seen the php side of your problem but anyway:
make a file called ping.php and put all your ping function code in there. ditto for ms
in your original php file that called those functions, make a div at each point where you wanted a function call. Give them appropriate ids. Eg: "ping_contents" and "ms_contents"
You can populate these with some initial data if you want.
In your js put in something like this:
jQuery.ajax(
{
url : url_of_ping_function,
data : {anything you need},
type : 'POST', //or 'GET'
dataType: 'html',
success : function(data)
{
document.getElementById("ping_contents").innerHTML = data;
}
});
do another one for the other function
What you want is AJAX, Asynchronous JavaScript and XML
You can use jQuery for that.
I can put an example here, but there is a lot of information to be found on the internet. In the past I wrote my own AJAX code, but since I started using jQuery, it's all a lot easier. Look at the jQuery link I provided. There is some usefull information. This example code might be the easiest to explain.
$.ajax({
url: "test.php"
}).done(function() {
alert("done");
});
A some moment, for example on a click on a button, the file test.php is executed. When it's done, a alert box with the text "done" is shown. That's the basic.
I am trying to send the results of the current drag drop state back to mysql using ajax/php.
The console .log works fine..
With some help the drag and drop jquery feature is all working perfectly however sadly jquery/ajax is really not in my bag of tricks ..
http://jsfiddle.net/ambiguous/FMKmj/ (Credit mu)
Tearing my hair out , any ideas ?
If you just want to submit the groups hash, do it like:
$('#submit').click(function() {
var groups = { };
$('.sort').each(function() {
var a = [ ];
$(this).find('li').each(function() {
a.push(this.id);
});
groups[this.id] = a;
});
console.log(groups);
$.ajax({
url: "yourscript.php",
data: groups,
success: function(){
alert('sent!');
}
});
});
Step 1: Catch the event
Notice that in the JQuery UI doc for sortable there is an event tab: here.
So you have to bind an event to an Ajax call inside the event handling function called when a block is dropped in a new box.
Step 2: The Ajax call
It means you have to write your Ajax call: see here.
Typically, you will do a post request since moving a block from a place to another place will change something on the server side.
What do you send to the server ?
Basically you want to send to the server which block has moved where. But it is up to you, you can send whatever you want, it depends on you server side application.
Step 3: The server side
The server based on this information can execute MySQL requests.
I'm making a fairly simple rating system, and I've got a small problem. When you +1 rate something, I'm trying to run a PHP script which will connect to the database, download the value from it, +1 to that value, and UPDATE the value in the database again.
I don't think reloading the page for a continious rating system would be a very good idea :S
I'm wondering how I can toggle a PHP script with Ajax, so that when you Click an image of a + sign, it runs the PHP add 1 script, and the + button turns in to a tick. I'm crap at ajax, and I'd go for trying jQuery + $.ajax({}); but I've failed 73 attempts. haha.
Anyone willing to give me a hand writing an Ajax script? :DDD
Thanks! :)
If you want someone to click a link which will access your page, let's assume you have this marup:
<a class = 'plusOne' id = 'someIDForYourSQLTable'>+1</a>
The ID is what you are going to pass to your server script so you can update the appropriate row, generally speaking this should be a primary identifier (i.e. Key) for the record that you want to +1.
Here is the jQuery that will send the ajax request to the file: plusOne.php in the same directory as the current page:
$(function() {
$(".plusOne").bind("click", function() {
$.ajax({
type: "GET",
data: "v="+$(this).attr("id"),
url: "plusOne.php",
success: function(data) {
// Whatever you want to do after the PHP Script returns.
}
});
});
});
The request will send the a URL parameter 'v' which you can access in your PHP script from the $_GET super global array.
html
<img src="plusone.png" rel="some_unique_id" class="rate" />
javscript
$(".rate").click(function() {
var elem = $(this);
$.get('/rate.php?id=' + elem.attr('rel'), function() {
elem.attr('src', 'checked.png').unbind('click');
});
});
and in php
mysql_connect('localhost','db_user','pssword');
mysql_query('UPDATE database_name.table_name SET rating=rating+1 where id=' . mysql_real_escape_string($_GET['id']));
Have a look at xAjax, a library to expose PHP functions/method to client-side JavaScript. xAjax makes things very simple.
For example, you are able to perform several changes in the browser in parallel:
$objResponse = new xajaxResponse();
$objResponse->assign("myInput1","value",$DataFromDatabase);
$objResponse->assign("myInput1","style.color","red");
$objResponse->append("myDiv1","innerHTML",$DataFromDatabase2);
$objResponse->prepend("myDiv2","innerHTML",$DataFromDatabase3);
$objResponse->replace("myDiv3","innerHTML","xajax","<strong>xajax</strong>");
$objResponse->script("var x = prompt("Enter Your Name");");
return $objResponse;
I'm looking to display data from a table in a mysql database using PHP, however, I want the data to automatically update itself and retrieve current values every 5 seconds.. WITHOUT having to refresh the page. Is this possible? Maybe with JQuery/ AJAX? If so, please explain how it can be done / point me to a resource where I can find such information
Thanks
If you use window.setInterval() and jQuery's .load() you should be able to do what you want. The PHP script should return the HTML that needs to replace the previous one.
Javascript:
function refreshData()
{
// Load the content of "path/to/script.php" into an element with ID "#container".
$('#container').load('path/to/script.php');
}
// Execute every 5 seconds
window.setInterval(refreshData, 5000);
A really basic example:
function poll(){
$.ajax({
type: "GET",
url: "your/php/script/",
success: function(data){
// do something with data
}
});
};
setInterval(poll, 5000);
jQuery is a good option. Here are the docs for ajax.
You will want to make this call with setInterval
Something like this might get your started.
setIntervla(updateFromDb,5000);
function updateFromDb(){
$.ajax({
url: "getUpdates.php",
success: function(){
$(this).addClass("done");
}
});
};
What you are describing is exactly the type of the AJAX is used for, AJAX allows for asynchronous requests to be made to your server.
For learning I would suggest using a framework like Jquery and look into the AJAX api.
Basicly you will need a PHP script that query the database and responds the results the way you want them. A suggestion would be to JSON encode them.
In JavaScript on the client you will need to you things like:
var poll = setInterval(function(){
$.ajax({
type:"GET",
url: "yourpage.php",
success: function(data){
//HANDLE DATA
// use JSON.parse(data); if your JSON encoding your data
}
});
},5000)
Just go to the documentation of jQuery:
http://api.jquery.com/category/ajax/
Use the command "jQuery.get()" or better "jQuery.getJson()" to make a http request to the server. Use JSON to get a better communication between server and client. Return from server side a json string and convert this on the client to an javascript object. (the function jQuery.getJson already do this for you) so you can easily access the key and values in the data array.
Just an example:
SERVER Part with PHP:
<?
$data = array('key'=>'value');
return json_encode($data, true);
CLIENT Part:
$.getJSON('myurl.php', function(data) {
// THIS ONE IS CALLED with your PHP data
alert(data.key);
});
$(function(){
window.setInterval(function(){
$.post("filename.php",{'field1':field1,'field2':field2,'field3':field3},function(data){
//callbackfunction(data)
})
},30000);//millisecs
});
And have your php file do all your sql