convert text file to json php

//Json Encode

$person = array( 
    "name" => "KINGASV", 
    "title" => "CTO"
); 
$personJSON=json_encode($person);//returns JSON string

//Json Decode

$personJSON = '{"name":"KINGASV","title":"CTO"}';

$person = json_decode($personJSON);

echo $person->name; // KINGASV

  <?php
$myObj->name = "John";
$myObj->age = 30;
$myObj->city = "New 
  York";

$myJSON = json_encode($myObj);

echo $myJSON;
?>
 

<?php
  header('Content-type: application/json');
  echo json_encode( explode("\r\n",file_get_contents('data.txt')) );
?>