/**
* 知识点：
* debug_backtrace--追踪,返回数组（有当前行号，文件路径）
* 如：in D:\AppServ\www\myproject\protected\extensions\yii-debug-toolbar\YiiDebugToolbar.php (177)
*
*/
public static function log($msg, $level = CLogger::LEVEL_INFO, $category = 'application')
{
if (self::$_logger === null) {
self::$_logger = new CLogger();
}
if (YII_DEBUG && YII_TRACE_LEVEL > 0 && $level !== CLogger::LEVEL_PROFILE) {
$traces = debug_backtrace();
$count = 0;
foreach ($traces as $trace) {
if (isset($trace['file'], $trace['line']) && strpos($trace['file'], YII_PATH) !== 0) {
$msg .= "\nin " . $trace['file'] . ' (' . $trace['line'] . ')';
if (++$count >= YII_TRACE_LEVEL) {
break;
}
}
}
}
self::$_logger->log($msg, $level, $category);
}
public static function setLogger($logger)
{
self::$_logger = $logger;
}
/**
* @return CLogger message logger
*/
public static function getLogger()
{
if (self::$_logger !== null) {
return self::$_logger;
} else {
return self::$_logger = new CLogger();
}
}