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Getting value of ajax json variable

I have this in my javascript function
var jsonData = $.ajax({
url: "pie_chart_community.php",
community_id: $c_id,
dataType: "json",
async: false
}).responseText;
I want to get the community_id in another PHP page. How can I get it?
Thanks in advance.

You could store the community_id variable in session data?
<?php session_start(); ?>
<?php $_SESSION['community_id'] = SOME_ID; ?>
Then to Access it:
<?php echo $_SESSION['community_id'];?>

Facing on Make Like Unlike Button in php , mysql using ajax calling

I m creating like and unlike button for my website , at my local server i used seprate file it it working fine but when i install at my website then it is not working properly.
I m Fetching some information using this code from url bar
<?php
error_reporting (0);
include "includes/session.php";
include 'database/db.php';
extract($_REQUEST);
if(isset($_GET["i"]))
{
$pid=($_GET['p']);
$lid=($_GET['i']);
}
?>
<?php
$likquery = mysql_query("select * from likes where userid=$id and postid=$lid");
if(mysql_num_rows($likquery)==1){
?>
<a class="unlike" id="<?php echo $lid ?>">UnLike</a> <span class="like_update" id="<?php echo $lid ?>"></span>
<?php }else{?>
<a class="like" id="<?php echo $lid ?>">Like</a>
<?php
}?>
AFTER this I use script
<script src="js/jquery-1.8.3.min.js" type="text/javascript"></script>
<script>
$(document).ready(function(){
$('body').on('click','.like',function(){
var postId = $(this).attr('id');
var postData = 'postid='+postId+'&uid=<?php echo $id ?>';
$.ajax({
type: "POST",
url: "like_notes",
data: postData,
cache: false,
success: function(){
$('#'+postId).text('UnLike').addClass('unlike').removeClass('like');
}
});
})
$('body').on('click','.unlike',function(){
var postId = $(this).attr('id');
var postData = 'postid='+postId+'&uid=<?php echo $id ?>';
$.ajax({
type: "POST",
url: "likeun_notes",
data: postData,
cache: false,
success: function(){
$('#'+postId).text('Like').addClass('like').removeClass('unlike');
}
});
})
});
</script>
And I m not getting any response but when i use
<script src="js/jquery-1.8.3.min.js" type="text/javascript"></script>
<script>
$(document).ready(function(){
$(".like").click(function(){
var postId = $(this).attr('id');
var postData = 'postid='+postId+'&uid=<?php echo $id ?>';
$.ajax({
type: "POST",
url: "like_notes",
data: postData,
cache: false,
success: function(){
$('#'+postId).text('UnLike').addClass('unlike').removeClass('like');
}
});
})
$(".unlike").click(function(){
var postId = $(this).attr('id');
var postData = 'postid='+postId+'&uid=<?php echo $id ?>';
$.ajax({
type: "POST",
url: "likeun_notes",
data: postData,
cache: false,
success: function(){
$('#'+postId).text('Like').addClass('like').removeClass('unlike');
}
});
})
});
</script>
only once it is changing the value

Ok, the second version works only once, because at the beginning, the event is on the button, then you re-render the button by changing it's class and text, so the events get unbinded.
Same is for the 1st version. Jquery says: Event handlers are bound only to the currently selected elements; they must exist on the page at the time your code makes the call to .on().... If new HTML is being injected into the page, select the elements and attach event handlers after the new HTML is placed into the page.
So re-bind the events after changing the button.
I suggest something like this:
function bindEvents() {
$('.like').off().on('click', function(){
var postId = $(this).attr('id');
var postData = 'postid='+postId+'&uid=' + <?php echo $id ?>;
$.ajax({
type: "POST",
url: "like_notes",
data: postData,
cache: false,
success: function(){
$('#'+postId).text('UnLike').addClass('unlike').removeClass('like');
//rebind events here
bindEvents();
}
});
$('.unlike').off().on('click', function(){
var postId = $(this).attr('id');
var postData = 'postid='+postId+'&uid=' + <?php echo $id ?>;
$.ajax({
type: "POST",
url: "likeun_notes",
data: postData,
cache: false,
success: function(){
$('#'+postId).text('Like').addClass('like').removeClass('unlike');
//rebind events here
bindEvents();
}
});
}
$(document).ready(function(){
bindEvents();
});
Also notice that in var postData = 'postid='+postId+'&uid=<?php echo $id ?>'; code, the php part won't be treated as php. It will be just a string. So replace that part with the following, assuming that the code is located inside a php file:
var postData = 'postid='+postId+'&uid=' + <?php echo $id ?>;

Passing value to php script via Ajax

I have a problem to pass value to my php script via Ajax, there is my code :
I send value to ajax via a href link :
After scan directory i get links of my files on href :
<?php echo $file; ?>
My js function to receive value :
function getfilename(content) {
alert(content); // i can see my value here
$.ajax({ //not work
type: 'POST',
url: 'script.php',
data:{song: content},
async: false,
success: function(response) {
alert(response); //nothing
});
}
My script.php
$album = $_POST['song'];
echo $album;
I dont understand why it does not work.
Thank you for your help!

Try changing
<?php echo $file; ?>
To this
<?php echo $file; ?>
Maybe your page is refreshing before the ajax data loads.

When you use the link element it will automatically go to the location in the href after it executes the onclick event. Leaving it empty will reload the page.
I would recommend you to add a "return false;" as the last instruction of the onclick.
<?php echo $file?>
Hope this helps.

Looking to your js code your success callback is missing a "}" in the end of function.
// $file = 'teste';
<?php echo $file?>
function getfilename(content) {
alert(content);
$.ajax({
type: 'POST',
url: 'script.php',
data:{song: content},
async: false,
success: function(response) {
alert('Response: ' + response); //Alerts Result
}
});
}
// Script.php
<?php
echo $_POST['song']
?>

Send array from javascript to php then write it to file

i cant seem to get this to work, i'm trying to send a variable to php so it can write it to file but its just not working..
var jsonString = JSON.stringify(vars);
$.ajax({
type: "POST",
url: "woepanel.php",
data: {data : jsonString},
cache: false,
success: function(){
$('#sent').attr("bgcolor", "#00FF00");
$('#notsent').attr("bgcolor", "#FFFFFF");
}
});
it seems to be sending ok because the success works but php wont pick it up
<?php
$vars=json_decode($_POST['jsondata']);
?>
<?php
$fp = fopen('vars.txt', 'w');
fwrite($fp, $_POST["jsondata"]);
fclose($fp);
?>

Try this code:
<?php
$vars=json_decode($_POST['data']);
$string_data = serialize($vars);
file_put_contents('vars.txt', $string_data);
?>

you have this
data: {data : jsonString}
in your ajax call which means you should use
$_POST['data']
to extract the value

How to pass variables from PHP to Javascript using Ajax calls

I read this post and assumed the technique in the answer would work with ajax calls. I have my ajax and php code below but it does not work.The client does not recognize the 'passed' variable. I do not know why nor how to remedy this.
Javascript
var irrelevant = 'irrelevant';
$('body').click(function(){
$.ajax({
type: 'POST',
url: 'test.php',
data: {mydata: irrelevant},
success: function(){
console.log('worky');
alert(myvar); // NOT worky!
}
});
});
PHP File
<?php
$thing = 10;
?>
<script>
var myvar = "<?php echo $thing; ?>";
</script>

try this in your ajax.success
success: function(data){
console.log('worky');
alert(data); // It should now, worky!
}
and in you php
<?php
echo 10;
?>

try this
in php
<?php $thing = 10; ?>
<script>
var myvar = "<?php echo $thing; ?>";
</script>
javascript
$('body').click(function(){
$.ajax({
type: 'POST',
url: 'test.php',
data: {mydata: irrelevant},
success: function(data){
$("#hiddendiv").html(data);
alert(myvar);
}
});
});