php – How do I get a separate key and value from the resulting json?-ThrowExceptions

Exception or error:

I send data to function.php

method: 'POST',
JSON.stringify( { username1: 'example1', username2: 'example2' } ),
headers: {
  'Content-Type': 'application/x-www-form-urlencoded'
},

How do i analyze this data and return each key and value separately?
username1 or example1 or username2 or example2

I tried this

$data = json_encode($_POST);
echo $data;

But this code returns a strange object, where all data is in the key and the value is empty
{{“username1″:”example1″,”username2″:”example2”}: “”}

This also doesn’t work

    $data["username1"]; // return only {
    $data->username1; // return empty

I don’t know if this will help

var_dump($_POST);
array(1) {
  ["{"username1":"example1","username2":"example2"}"]=>
  string(0) ""
}

and

var_dump(json_encode($_POST));
string(62) "{"{\"username1\":\"example1\",\"username2\":\"example2\"}":""}"
How to solve:

If what your asking for is calling on values within an object being returned from json I think this may help (providing i understand your answer)

var obj = JSON.parse(data); // This will parse the json data thats being returned 
var username = obj[0].username1;
console.log(username);

That should log in the console the value of the JSON object you created.

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