<?php
 
 namespace Psr\Log;
 
 /**
  * Describes a logger instance.
  *
  * The message MUST be a string or object implementing __toString().
  *
  * The message MAY contain placeholders in the form: {foo} where foo
  * will be replaced by the context data in key "foo".
  *
  * The context array can contain arbitrary data. The only assumption that
  * can be made by implementors is that if an Exception instance is given
  * to produce a stack trace, it MUST be in a key named "exception".
  *
  * See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-3-logger-interface.md
  * for the full interface specification.
  */
 interface LoggerInterface
 {
     /**
      * System is unusable.
      *
      * @param string $message
      * @param array  $context
      *
      * @return void
      */
     public function emergency($message, array $context = array());
 
     /**
      * Action must be taken immediately.
      *
      * Example: Entire website down, database unavailable, etc. This should
      * trigger the SMS alerts and wake you up.
      *
      * @param string $message
      * @param array  $context
      *
      * @return void
      */
     public function alert($message, array $context = array());
 
     /**
      * Critical conditions.
      *
      * Example: Application component unavailable, unexpected exception.
      *
      * @param string $message
      * @param array  $context
      *
      * @return void
      */
     public function critical($message, array $context = array());
 
     /**
      * Runtime errors that do not require immediate action but should typically
      * be logged and monitored.
      *
      * @param string $message
      * @param array  $context
      *
      * @return void
      */
     public function error($message, array $context = array());
 
     /**
      * Exceptional occurrences that are not errors.
      *
      * Example: Use of deprecated APIs, poor use of an API, undesirable things
      * that are not necessarily wrong.
      *
      * @param string $message
      * @param array  $context
      *
      * @return void
      */
     public function warning($message, array $context = array());
 
     /**
      * Normal but significant events.
      *
      * @param string $message
      * @param array  $context
      *
      * @return void
      */
     public function notice($message, array $context = array());
 
     /**
      * Interesting events.
      *
      * Example: User logs in, SQL logs.
      *
      * @param string $message
      * @param array  $context
      *
      * @return void
      */
     public function info($message, array $context = array());
 
     /**
      * Detailed debug information.
      *
      * @param string $message
      * @param array  $context
      *
      * @return void
      */
     public function debug($message, array $context = array());
 
     /**
      * Logs with an arbitrary level.
      *
      * @param mixed  $level
      * @param string $message
      * @param array  $context
      *
      * @return void
      */
     public function log($level, $message, array $context = array());
 }