public static function loadCached($url, $expires, $debug = false)
{
if (!function_exists('curl_version')) {
ErrorHelper::logWarning('Could not fetch data, cURL unavailable');
return null;
}
if ($debug) {
ErrorHelper::logDebug('cURL for: ' . $url);
}
$filename = LoadHelper::getFilename($url);
if (!LoadHelper::hasCache($url, $expires)) {
if ($debug) {
ErrorHelper::logDebug('No cache or expired, making new request');
}
$rawData = LoadHelper::load($url);
if (!$rawData) {
if ($debug) {
ErrorHelper::logDebug('cURL request failed: ' . LoadHelper::$error);
}
if (LoadHelper::hasCache($url, -1)) {
if ($debug) {
ErrorHelper::logDebug('Using expired cache');
}
$cache = file_get_contents($filename);
return $cache;
} else {
if ($debug) {
ErrorHelper::logDebug('Request failed, no cache');
}
return false;
}
}
if ($debug) {
ErrorHelper::logDebug('Data returned, saving it to cache');
}
$folder = LoadHelper::getCacheDir();
if (!file_exists($folder)) {
mkdir($folder);
}
$cache = @fopen($filename, 'wb');
$write = $cache ? fwrite($cache, $rawData) : null;
if (!$write) {
ErrorHelper::logWarning('Writing to cache failed. Make sure the folder ' . $folder . ' exists and is writeable (chmod 777)');
}
if ($cache) {
fclose($cache);
}
return $rawData;
}
if ($debug) {
ErrorHelper::logDebug('Cache hit, using that');
}
return file_get_contents($filename);
}
