print data to json in php code example

Example 1: php echo json

<?php
$data = ['name' => 'John', 'age' => 35];
header('Content-type: Application/json');
echo json_encode($data);

Example 2: how to receive json data in php

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