Json

index.php

<?php

$json = file_get_contents('http://localhost/json/json.php'); // só alterei o caminho
$obj =  json_decode($json);
var_dump($obj);
print_r($obj);

/*
var_dump
object(stdClass)#1 (4) {
  ["locutor"]=>
  string(4) "Joke"
  ["programa"]=>
  string(5) "J-MIX"
  ["musica"]=>
  string(26) "Asian Kung Fu - Generation"
  ["ouvintes"]=>
  string(1) "4"
}

print_r
stdClass Object
(
    [locutor] => Joke
    [programa] => J-MIX
    [musica] => Asian Kung Fu - Generation
    [ouvintes] => 4
)
*/

json.php

<?php
header('Content-Type: application/json');
 
$json = array(
        'locutor'=>'Joke',
        'programa'=>'J-MIX',
        'musica'=>'Asian Kung Fu - Generation',
        'ouvintes'=>'4'
);
 
print json_encode($json);