How to create a JSON array using PHP - php

Question

My JSON data looks like this:
[
{
"email":"test#test.com",
"firstName":"test",
"lastName":"test",
"value":"test#test.com",
"tokens":"test#test.com"
},
{
...
}
]
and php data to create json file looks like this:
<?php
session_start();
include('connection.php');
$userId = $_SESSION['sess_user_id'];
$act = $_POST['action'];
$sth = mysql_query("SELECT email, firstName, lastName, email AS value, email AS tokens FROM User");
$rows = array();
while($r = mysql_fetch_assoc($sth))
{
$rows[] = $r;
}
$fp = fopen('./test.json', 'w');
fwrite($fp, json_encode($rows));
fclose($fp);
?>
When a user is added to the database, it runs this php code:
$file = './test.json';
$data = json_decode(file_get_contents($file), true);
$newdata = array('email'=>$email, 'firstName' => $firstName, 'lastName'=>$lastName, 'value'=>$email, 'tokens'=>$email);
$data[] = $newdata;
file_put_contents($file, json_encode($data));
I want the my JSON file to look like this:
[
{
"email":"test#test.com",
"firstName":"test",
"lastName":"test",
"value":"test#test.com",
"tokens":[
"test#test.com"
]
}
]
I tried to figure this out, but I couldn't. Please help?

Answer 1

php handles arrays different than javascript (which differentiates between objects and arrays).
$newdata = array(
'email'=>$email,
'firstName' => $firstName,
'lastName'=>$lastName,
'value'=>$email,
'tokens'=>array($email)
);
should do it.