<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* A caching proxy for retrieving version information from phpmyadmin.net
*
* @package PhpMyAdmin
*/

// Sets up the session
define('PMA_MINIMUM_COMMON', true);
require_once 'libraries/common.inc.php';

// Get response text from phpmyadmin.net or from the session
// Update cache every 6 hours
if (isset($_SESSION['cache']['version_check'])
&& time() < $_SESSION['cache']['version_check']['timestamp'] + 3600 * 6
) {
$save = false;
$response = $_SESSION['cache']['version_check']['response'];
} else {
$save = true;
$file = 'http://www.phpmyadmin.net/home_page/version.json';
if (ini_get('allow_url_fopen')) {
$response = file_get_contents($file);
} else if (function_exists('curl_init')) {
$curl_handle = curl_init($file);
curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
$response = curl_exec($curl_handle);
}
}

// Always send the correct headers
header('Content-type: application/json; charset=UTF-8');

// Save and forward the response only if in valid format
$data = json_decode($response);
if (is_object($data) && strlen($data->version) && strlen($data->date)) {
if ($save) {
$_SESSION['cache']['version_check'] = array(
'response' => $response,
'timestamp' => time()
);
}
echo json_encode(
array('version' => $data->version, 'date' => $data->date)
);
}

?>