version_check.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * A caching proxy for retrieving version information from phpmyadmin.net
   5  *
   6  * @package PhpMyAdmin
   7  */
   8
   9 // Sets up the session
  10 define('PMA_MINIMUM_COMMON', true);
  11 require_once 'libraries/common.inc.php';
  12
  13 // Get response text from phpmyadmin.net or from the session
  14 // Update cache every 6 hours
  15 if (isset($_SESSION['cache']['version_check'])
  16     && time() < $_SESSION['cache']['version_check']['timestamp'] + 3600 * 6
  17 ) {
  18     $save = false;
  19     $response = $_SESSION['cache']['version_check']['response'];
  20 } else {
  21     $save = true;
  22     $file = 'http://www.phpmyadmin.net/home_page/version.json';
  23     if (ini_get('allow_url_fopen')) {
  24         $response = file_get_contents($file);
  25     } else if (function_exists('curl_init')) {
  26         $curl_handle = curl_init($file);
  27         curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
  28         $response = curl_exec($curl_handle);
  29     }
  30 }
  31
  32 // Always send the correct headers
  33 header('Content-type: application/json; charset=UTF-8');
  34
  35 // Save and forward the response only if in valid format
  36 $data = json_decode($response);
  37 if (is_object($data) && strlen($data->version) && strlen($data->date)) {
  38     if ($save) {
  39         $_SESSION['cache']['version_check'] = array(
  40             'response' => $response,
  41             'timestamp' => time()
  42         );
  43     }
  44     echo $response;
  45 }
  46
  47 ?>