how to receive json data in php

$data = json_decode(file_get_contents('php://input'), true);
print_r($data);
echo $data;

<?php
$jsonurl = "https://reqres.in/api/users/2";
$json = file_get_contents($jsonurl);
$jsonDecode = json_decode($json, true);
echo $jsonDecode['data']['email'];
?>