Question: I have some problem using ajax.

How can I assign all result from ajax into outside variable ?

I google it up and found this code..

```
var return_first = (function () {
    var tmp = null;
    $.ajax({
        'async': false,
        'type': "POST",
        'global': false,
        'dataType': 'html',
        'url': "ajax.php?first",
        'data': { 'request': "", 'target': arrange_url, 'method': method_target },
        'success': function (data) {
            tmp = data;
        }
    });
    return tmp;
});

```

but not work for me..

Can anybody tell what is wrong about that code ?

Answer: 
You are missing a comma after

```
'data': { 'request': "", 'target': 'arrange_url', 'method': 'method_target' }

```

Also, if you want `return_first` to hold the result of your anonymous function, you need to make a function call:

```
var return_first = function () {
    var tmp = null;
    $.ajax({
        'async': false,
        'type': "POST",
        'global': false,
        'dataType': 'html',
        'url': "ajax.php?first",
        'data': { 'request': "", 'target': 'arrange_url', 'method': 'method_target' },
        'success': function (data) {
            tmp = data;
        }
    });
    return tmp;
}();

```

Note `()` at the end.
So this is long after the initial question, and technically it isn't a direct answer to how to use Ajax call to populate exterior variable as the question asks. However in research and responses it's been found to be extremely difficult to do this without disabling asynchronous functions within the call, or by descending into what seems like the potential for callback hell. My solution for this has been to use [Axios](https://github.com/axios/axios). Using this has dramatically simplified my usages of asynchronous calls getting in the way of getting at data. 

For example if I were trying to access session variables in PHP, like the User ID, via a call from JS this might be a problem. Doing something like this..

```
async function getSession() {
 'use strict';
 const getSession = await axios("http:" + url + "auth/" + "getSession");
 log(getSession.data);//test
 return getSession.data;
}

```

Which calls a PHP function that looks like this.

```
public function getSession() {
 $session = new SessionController();
 $session->Session();
 $sessionObj = new \stdClass();
 $sessionObj->user_id = $_SESSION["user_id"];
 echo json_encode($sessionObj);
}

```

To invoke this using Axios do something like this.

```
getSession().then(function (res) {
 log(res);//test
 anyVariable = res;
 anyFunction(res);//set any variable or populate another function waiting for the data
});

```

The result would be, in this case a Json object from PHP.

```
{"user_id":"1111111-1111-1111-1111-111111111111"}

```

Which you can either use in a function directly in the response section of the Axios call or set a variable or invoke another function.

Proper syntax for the Axios call would actually look like this.

```
getSession().then(function (res) {
 log(res);//test
 anyVariable = res;
 anyFunction(res);//set any variable or populate another function waiting for the data
}).catch(function (error) {
 console.log(error);
});

```

For proper error handling.

I hope this helps anyone having these issues. And yes I am aware this technically is not a direct answer to the question but given the answers supplied already I felt the need to provide this alternative solution which dramatically simplified my code on the client and server sides.