Plain PHP Curl proxy script example for json APIs. I tried using Apache mod_proxy for that but it was returning 301 only on curl, on guzzle it was fine.

index.php

<?php

// Needs to be used with a .htaccess file pointing all requests to it

$uri = $_SERVER['REQUEST_URI'];

$queryString = http_build_query($_GET);
$payload = file_get_contents('php://input');
$url = 'https://foo.bar' . $uri;

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_TIMEOUT, 60);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $_SERVER['REQUEST_METHOD']);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content-Type: application/json',
    'Content-Length: ' . strlen($payload)
));

if($payload) {
  curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
}

$response = curl_exec($ch);

$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);

header('Status:', true, $status);
header('Content-Type: application/json');

echo $response;