Decode JSON post data - php

Question

My php file receives a post from ajax call. The string received by the php file is as follows :
array(1) { ["userid"]=> string(21) "assssssss,camo,castor" }
I am trying unsuccessfully to decode this string then loop through the values in the array. I have tried the following :
$myarray =json_decode($_POST["userid"],true);
foreach ($myarray as $value) {
//do something with value
}
I am not sure whether the decode is the issue or my syntax to loop through the PHP array.

Answer 1

The POST data you'd want to manipulate is stored in $_POST['userid]
In case you're trying to access this comma separated user ids, you need to convert this to an array first using explode(). And then loop through these id's.
if (isset($_POST)) {
$user_ids = $_POST['userid']; // assssssss,camo,castor
$user_id_arr = explode(',', $user_ids); // Converts string to array Array (0 => assssssss, 1 => camo, 2 => castor)
foreach ($user_id_arr as $user_id) {
//Statements
}
}

Answer 2

$_POST is an associative array of variables passed to the current script via the HTTP POST method when using application/x-www-form-urlencoded or multipart/form-data as the HTTP Content-Type in the request. So when you decode with json_decode that will decode JSON string to Object/Array.
But in your scenario you have not passed JSON String to $_POST so it not looks decoding.

Answer 3

The string you have passed into your $_POST is not JSON, so json_decode will not work on some random comma seperated values.
You can either pass in real JSON, or just use the explode method of splitting these values:
// explode example
$users = "assssssss,camo,castor";
$usersarray = explode(",", $users);