--- /dev/null
+<?php
+
+namespace Psr\Log;
+
+/**
+ * Describes log levels.
+ */
+class LogLevel
+{
+ const EMERGENCY = 'emergency';
+ const ALERT = 'alert';
+ const CRITICAL = 'critical';
+ const ERROR = 'error';
+ const WARNING = 'warning';
+ const NOTICE = 'notice';
+ const INFO = 'info';
+ const DEBUG = 'debug';
+}