How to Write PHP in AJAX - php

Question

I am trying to get my session in ajax.. for that i had written my code like this
BTLJ.ajax({
type: "POST",
url: btlOpt.BT_AJAX,
data: datasubmit,
success: function(html){
//if html contain "Registration failed" is register fail
BTLJ("#btl-register-in-process").hide();
if(html.indexOf('$error$')!= -1){
...
...
}
}else{
BTLJ(".btl-formregistration").children("div").hide();
BTLJ("#btl-success").html(html);
BTLJ("#btl-success").show();
alert(<?php session_start(); print_r($_SESSION); ?>);
setTimeout(function() { ); BTLJ(".kcregbox").show();},7000);
// BTLJ("#btl-success").hide();
}
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert(textStatus + ': Ajax request failed');
}
});
but ajax is not working if i write like that.. please help me in getting my session in ajax. thanks in advance.

Answer 1

Your AJAX query in Joomla should be formatted as below.
jQuery.post('index.php',{
'option' : 'com_componentname',
'controller' : 'controllername',
'task' : 'task_name',
'format' : 'raw',
'data' : data
}).success(function(result) {
//if the request is success
}).error(function() {
//if the request is fails
});

Answer 2

I'm using this format for ajax in joomla
$.ajax({
type: 'GET',
url: 'index.php',
data: {option: 'com_componenetname', task: 'taskname.youroperation', format: 'json', tmpl: 'raw'},
dataType: 'json',
async: true, // can be false also
error: function(xhr, status, error) {
console.log("AJAX ERROR in taskToggleSuceess: ")
var err = eval("(" + xhr.responseText + ")");
console.log(err.Message);
},
success: function(response){
// on success do something
// use response.valuname for server's data
}
,
complete: function() {
// stop waiting if necessary
}
});
In your component/controllers you should have a file yourcontroller.json.php which will process your call and return encoded json array will all the data you need in the client