/**
* Check filemtimes to see if the cache should be updated
*
* @access private
*
*/
function _cacheIsValid()
{
// First of all check configuration. If autoupdate is set to false always
// return true, otherwise check
if (WURFL_CACHE_AUTOUPDATE === false) {
return true;
}
// WURFL hasn't been loaded into memory, I'll do it now
$pwurple_stat = filemtime(WURFL_FILE);
if (defined('WURFL_PATCH_FILE') && file_exists(WURFL_PATCH_FILE)) {
$patch_stat = filemtime(WURFL_PATCH_FILE);
if ($patch_stat > $pwurple_stat) {
// if the patch file is newer than the WURFL I set pwurple_stat to that time
$pwurple_stat = $patch_stat;
}
}
$cache_stat = stat_cache();
if ($pwurple_stat <= $cache_stat) {
return true;
} else {
$this->_toLog('_cacheIsValid', 'cache file is outdated', LOG_INFO);
return false;
}
}
if (!@error_log($_textToLog . "\n", 3, WURFL_LOG_FILE)) {
error_log("Unable to log to " . WURFL_LOG_FILE . " log_message:{$_textToLog}");
// logging in the webserver's log file
}
} else {
error_log($_textToLog);
// logging in the webserver's log file
}
}
if (!file_exists(WURFL_FILE)) {
wurfl_log('main', WURFL_FILE . " does not exist");
die(WURFL_FILE . " does not exist");
}
if (WURFL_AUTOLOAD === true) {
$wurfl_stat = filemtime(WURFL_FILE);
$cache_stat = stat_cache();
if (defined('WURFL_PATCH_FILE') && file_exists(WURFL_PATCH_FILE)) {
$patch_stat = filemtime(WURFL_PATCH_FILE);
} else {
$patch_stat = $wurfl_stat;
}
if (WURFL_USE_CACHE && $wurfl_stat <= $cache_stat && $patch_stat <= $cache_stat) {
// cache file is updated
//echo "wurfl date = ".$wurfl_stat."<br>\n";
//echo "patch date = ".$patch_stat."<br>\n";
//echo "cache date = ".$cache_stat."<br>\n";
list($cache_stat, $wurfl, $wurfl_agents) = load_cache();
// echo "cache loaded";
} else {
list($cache_stat, $wurfl, $wurfl_agents) = parse();
}
