Here are some useful links

*/ // API authentication $yourApiId = '1tQZ1VaAl9TplqGB1xmA2pwZ1xmAkVGp'; $yourAPIKey = 'ZQIuBJWwZQx5AzSvAQHlLGp0Zmp1ZGtmLzWyAwV5ATZ'; $apiUrl = 'https://www.provenexpert.com/api_rating_v5.json'; // cache options $errorFile = '/provenexpert_error.txt'; $cacheFile = '/provenexpert_9532f07f8d34de011fbd7b1cc13301de.json'; $cachePath = dirname($_SERVER['SCRIPT_FILENAME']) . $cacheFile; $cachingTime = 3600; // in seconds $scriptVersion = '1.8'; if (! file_exists($cachePath)) { @touch($cachePath, $cachingTime); @chmod($cachePath, 0666); } // check if user ca write the cache file, otherwise use the system temp directory if (! is_writable($cachePath)) { $cachePath = sys_get_temp_dir() . $cacheFile; if (! file_exists($cachePath)) { @touch($cachePath, $cachingTime); @chmod($cachePath, 0666); } } if (function_exists('curl_init')) { try { // check if a cache file exists and its age inside the caching time range if (! file_exists($cachePath) || (time() - filemtime($cachePath)) > $cachingTime) { // init curl handler $curlHandler = curl_init(); // set curl options curl_setopt($curlHandler, CURLOPT_TIMEOUT, 3); curl_setopt($curlHandler, CURLOPT_RETURNTRANSFER, true); curl_setopt($curlHandler, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($curlHandler, CURLOPT_URL, $apiUrl . '?v=' . $scriptVersion); curl_setopt($curlHandler, CURLOPT_USERPWD, $yourApiId . ':' . $yourAPIKey); if (defined('CURLOPT_IPRESOLVE') && defined('CURL_IPRESOLVE_V4')) { curl_setopt($curlHandler, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4); } // send call to api $json = curl_exec($curlHandler); if ($json === false) { // curl error $errorMessage = 'curl error (' . date('c') . ')'; if (file_exists($cachePath)) { $errorMessage .= PHP_EOL . PHP_EOL . 'last call: ' . date('c', filemtime($cachePath)); } $errorMessage .= PHP_EOL . PHP_EOL . curl_error($curlHandler); $errorMessage .= PHP_EOL . PHP_EOL . print_r(curl_version(), true); @file_put_contents(dirname($cachePath) . $errorFile, $errorMessage); $json = json_encode(array('status' => 'error', 'errors' => array('curl error'))); } curl_close($curlHandler); // convert json to array $data = json_decode($json, true); if (! is_array($data)) { // json format is wrong $errorMessage = 'json error (' . date('c') . ')' . PHP_EOL . PHP_EOL . $json; if (file_exists($cachePath)) { $errorMessage .= PHP_EOL . PHP_EOL . 'last call: ' . date('c', filemtime($cachePath)); } @file_put_contents(dirname($cachePath) . $errorFile, $errorMessage); $data = array('status' => 'error', 'errors' => array('json error')); $json = json_encode($data); } if ($data['status'] == 'success') { if (is_writable($cachePath)) { // save data in cache file @file_put_contents($cachePath, $json); } else { echo(''); } } elseif(! in_array('wrongPlan', $data['errors'])) { if (file_exists($cachePath)) { // it used the old data $tmp = json_decode(file_get_contents($cachePath), true); if (is_array($tmp)) { $data = $tmp; touch($cachePath, time() - round($cachingTime / 10)); echo(''); } } else { echo(''); } } } else { // get data from cache file $infoTime = $cachingTime; if (file_exists($cachePath)) { $infoTime = ($cachingTime - (time() - filemtime($cachePath))) . '/' . $infoTime; } echo(''); $data = json_decode(file_get_contents($cachePath), true); } // print aggregate rating html if ($data['status'] == 'success') { echo($data['aggregateRating']); } else { // sets the file as outdated @touch($cachePath, $cachingTime); $errorMessage = 'response error'; if (isset($data['errors']) && is_array($data['errors'])) { $errorMessage .= ' (' . implode(', ', $data['errors']) . ')'; } $errorMessage .= ' [v' . $scriptVersion . ']'; echo(''); } } catch (Exception $e) { $errorMessage = 'exception' . PHP_EOL . PHP_EOL . $e->__toString(); @file_put_contents(dirname($cachePath) . $errorFile, $errorMessage); echo(''); } } else { echo(''); } ?>