Convert php output to JSON - php

Question

I have the following output from a PHP script:
one#gmail.com test1
two#gmail.com test2
which is generated from the following:
$i = 0;
$header = array();
while (!feof($handle)) {
$buffer = fgets($handle, $chunk_size);
if (trim($buffer)!=''){
$obj = json_decode($buffer);
echo $obj[0]." ".$obj[2]."<br>";
$i++;
}
}
fclose($handle);
How can i convert the output of the script into a JSON format of :
{"emails":[{"email":"one#gmail.com","option":test1"},{"email":"two#gmail.com","option":test2"}]}
The script was taken from the Mailchimp API which list the subscribers of a list.
Here is the script for reference:
<?php
$apikey = '1234-us7';
$list_id = '1234';
$chunk_size = 4096; //in bytes
$url = 'http://us7.api.mailchimp.com/export/1.0/list?apikey='.$apikey.'&id='.$list_id.'&output=json';
/** a more robust client can be built using fsockopen **/
$handle = #fopen($url,'r');
if (!$handle) {
echo "failed to access url\n";
} else {
$i = 0;
$header = array();
while (!feof($handle)) {
$buffer = fgets($handle, $chunk_size);
if (trim($buffer)!=''){
$obj = json_decode($buffer);
if ($i==0){
//store the header row
$header = $obj;
} else {
//echo, write to a file, queue a job, etc.
echo $obj[0]." ".$obj[2]."<br>";
}
$i++;
}
}
fclose($handle);
}
?>
Thank you!

Answer 1

It appears to already be in JSON, because you are using json_decode to get that output. So just... stop using json_decode on it.

Answer 2

As #jessica has already mentioned, it appears that $buffer is coming to you as JSON, because you are running json_decode(&buffer) on it.
However, if you want to do some manipulations, arrange the data so you build an array like this:
$myArray = array(
'emails' => array(
array('email' => 'one#gmail.com','option' => 'test1'),
array('email' => 'two#gmail.com','option' => 'test2'),
)
);
Then:
echo json_encode(myArray);
Using your supllied code, it would be something like this (untested):
$myArray = array();
$i = 0;
$header = array();
while (!feof($handle)) {
$buffer = fgets($handle, $chunk_size);
if (trim($buffer)!='') {
$obj = json_decode($buffer);
$myArray['emails'][] = array('email' => $obj[0],'option' => $obj[2]);
$i++;
}
}
fclose($handle);
echo json_encode($myArray);

Answer 3

$i = 0;
$result = array(); //create a new array
$header = array();
while (!feof($handle)) {
$buffer = fgets($handle, $chunk_size);
if (trim($buffer)!=''){
$obj = json_decode($buffer);
//echo $obj[0]." ".$obj[2]."<br>"; //comment out this line
$result[] = array('email' => $obj[0], 'option' => $obj[2]); //push new obj to the array
$i++;
}
}
fclose($handle);
echo json_encode(array('emails' => $result)); // convert to json format