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how to store javascript variable into php

I want store clickede_id value into $id2[] give me some suggestions and also suggest some advance details
function yes(clicked_id)
{
var it1=clicked_id;
alert(it1);
var tt1=1;
var tt2= "<?php echo($id2[var it1]); ?>";
//var tt2=document.getElementById("idcheck").value;
alert(tt2);
var tt3=document.getElementById("idcheck1").value;
//alert(tt3);
}

When you develop a web application, you are creating tools to let client and server communicates (over the HTTP protocol). This communication is based on Requests and Responses.
The client send request to server and the server responds with a reponse. In your case, you choosed PHP as the server-side language that will create your responses as answers to client request. Thes responses are HTML (+ javascript). Anyways, the reponses are static stuff to be interpredted by the client.
So the code you have sent is seen by the browser as:
function yes(clicked_id)
{
var it1=clicked_id;
alert(it1);
var tt1=1;
var tt2= 3; // or whatever value returned by php
var tt2=document.getElementById("idcheck").value;
var tt3=document.getElementById("idcheck1").value;
// ajax call here
}
When you say : store data from javascript to php (even if it doesnt look as a correct senetence), you mean sending data from client to server. It can be done via a classical Post request (via form submit with page refresh) or via ajax without page refresh.
For ajax, please to check jQuery documentation for $.ajax function (if you want to have a cross browser compatible solution), or XMLHTTPRequest object if you want raw javascript and do the cross-browser compatibility yourself.

PHP executes in the server and send the result to your browser to display. Your JS executes at this browser stage. What you need to understand is that PHP has already been finished it's execution when your JS gets a chance to execute. Trying to change something in PHP through the JS is trying to access the past.
But, the good news is, that you can adopt a model where you feed your JS through the PHP script (look at this echo "<script>var s = 'from php'</script>") and JS feeds your NEXT php execution. You can use ajax or direct page calling for this.
Probably you should read this question: How to pass data from Javascript to PHP and vice versa?

Using JavaScript to send String to Servlet, and Results from servlet back to JavaScript

First of all: sorry for my bad grammer. English isn't my native language, but i will try to exlpain my problem as simple as i can.
I'm working on a web-application, where user can enter a link. (Question 1) This link should be send to the server/servlet and will be progressed to other things. (Question 2) After the progression, the servlet will send a json-array (?) back to the javascript-part of my app.
I'm completly new to this kind of stuff, but its very important to me, to find out how this works or better, how i can make this work. Its actually very simple, but i used plenty of weeks and cant figure it out.
The application is using the SAP UI5-libs (Question 3), where i would also like to know, if there is any possible way, to parse JSON with the UI5 libs.
I hope, i could explain my problem good enough, so i can get some help. Thanks to all!

The 'sending' of the string to the server/servlet would happen via ajax in either POST or GET form. That is up to you.
I recommend you use a javascript plugin like jQuery (JQuery Ajax API) because the regular ajax code is a bit messy.
As for the servlet/server communicating back to the client is as simple as writing to the page. In a typical servlet context it would be something like
out.print("This is a message");
where Ajax automatically returns the content of the entire page upon callback.
So in conclusion:
Consider test.jsp your servlet. I wish to send "Hi" from the client (being the browser) via GET to the servlet and I want the servlet to say "Hello" back.
I would open an ajax request of type GET to the url "test.jsp?param=Hi". In the servlet I receive this page request and process it. The servlet discards the parameter because it is not used and outputs "Hello" to the page.
In the client the ajax will have returned "Hello" and I can use this to put it into a var or whatever and all of this happened while not refreshing and not navigating in the original document where I did the javascript.
Another way is using websockets where you basically use sockets in javascript to send and receive any kind of data.
Also please check out this possible duplicate question: How to send a string to a servlet from javascript using xmlhttprequest

Pass javascript value into PHP variable [duplicate]

This question already has answers here:
How do I pass variables and data from PHP to JavaScript?
(19 answers)
Closed 7 years ago.
I'm trying to include JavaScript variables into PHP code as PHP variables, but I'm having problems doing so. When a button is clicked, the following function is called:
<script type="text/javascript">
function addTraining(leve, name, date)
{
var level_var = document.getElementById(leve);
var training_name_var = document.getElementById(name);
var training_date_var = document.getElementById(date);
<?php
$result = "INSERT INTO training(level, school_name, training_date) VALUES('level_var', 'training_name_var', 'training_date_var')" or die("Query not possible.");
?>
</script>
Is it possible?

PHP is run server-side. JavaScript is run client-side in the browser of the user requesting the page. By the time the JavaScript is executed, there is no access to PHP on the server whatsoever. Please read this article with details about client-side vs server-side coding.
What happens in a nutshell is this:
You click a link in your browser on your computer under your desk
The browser creates an HTTP request and sends it to a server on the Internet
The server checks if he can handle the request
If the request is for a PHP page, the PHP interpreter is started
The PHP interpreter will run all PHP code in the page you requested
The PHP interpreter will NOT run any JS code, because it has no clue about it
The server will send the page assembled by the interpreter back to your browser
Your browser will render the page and show it to you
JavaScript is executed on your computer
In your case, PHP will write the JS code into the page, so it can be executed when the page is rendered in your browser. By that time, the PHP part in your JS snippet does no longer exist. It was executed on the server already. It created a variable $result that contained a SQL query string. You didn't use it, so when the page is send back to your browser, it's gone. Have a look at the sourcecode when the page is rendered in your browser. You will see that there is nothing at the position you put the PHP code.
The only way to do what you are looking to do is either:
do a redirect to a PHP script or
do an AJAX call to a PHP script
with the values you want to be insert into the database.

<script type="text/javascript">
var jvalue = 'this is javascript value';
<?php $abc = "<script>document.write(jvalue)</script>"?>
</script>
<?php echo 'php_'.$abc;?>

You seem to be confusing client-side and server side code. When the button is clicked you need to send (post, get) the variables to the server where the php can be executed. You can either submit the page or use an ajax call to submit just the data.
-don

PHP runs on the server. It outputs some text (usually). This is then parsed by the client.
During and after the parsing on the client, JavaScript runs. At this stage it is too late for the PHP script to do anything.
If you want to get anything back to PHP you need to make a new HTTP request and include the data in it (either in the query string (GET data) or message body (POST data).
You can do this by:
Setting location (GET only)
Submitting a form (with the FormElement.submit() method)
Using the XMLHttpRequest object (the technique commonly known as Ajax). Various libraries do some of the heavy lifting for you here, e.g. YUI or jQuery.
Which ever option you choose, the PHP is essentially the same. Read from $_GET or $_POST, run your database code, then return some data to the client.

I had the same problem a few weeks ago like yours; but I invented a brilliant solution for exchanging variables between PHP and JavaScript. It worked for me well:
Create a hidden form on a HTML page
Create a Textbox or Textarea in that hidden form
After all of your code written in the script, store the final value of your variable in that textbox
Use $_REQUEST['textbox name'] line in your PHP to gain access to value of your JavaScript variable.
I hope this trick works for you.

You can take all values like this:
$abc = "<script>document.getElementByID('yourid').value</script>";

You can do what you want, but not like that. What you need to do is make an AJAX request from JavaScript back to the server where a separate PHP script can do the database operation.

ajax post big data Jquery

I am facing problem for sending big form data using ajax function to server i.e php page. In my page html input fields will add by users for making a quote. And user add many fields then all datas wont posted to server php page. Only some information will save in database and others will lost.
I have used post method in ajax function.
If you have any suggestion for this problem please suggest me.

Detect place of the problem
Check POST request. Did you see there your data. In case you see - there is only one reason some where on the server. It couldn't be limit of the post - because in this case you will never get any information on the server and all request would be cancelled.
Another place is in your javascript:
1. you make mistake in name of field
2. bug some where in library
3. bug in your code.
try to debug javascript and understand what happen there.

Ajax, Javascript, or Database for post/get results

I have a question about what backend to use. I have a html page that has various dropdown lists. On Submit I want to sent the results of that page to another page to compile the (average) results. Is there a way to do this without setting up a database? I was thinking of sending the data with Ajax and then compiling the data with Javascript on the receiving page.
I've done something like this before so any suggestions would be appreciated.

You can use jquery to check the changes in the dropdown list. Send the results to a jquery ajax page and get the return value as json. The result json can be shown on the same page with jquery.

I assume the page you are talking about is an html or jsp page. Yes you can use javascript ot process the data and then send it to a servlet and get it back to another jsp.