Developer
<?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|\Stringable $message
* @param mixed[] $context
*
* @return void
*/
public function emergency(string|\Stringable $message, array $context = []): void;
/**
* Action must be taken immediately.
*
* Example: Entire website down, database unavailable, etc. This should
* trigger the SMS alerts and wake you up.
*
* @param string|\Stringable $message
* @param mixed[] $context
*
* @return void
*/
public function alert(string|\Stringable $message, array $context = []): void;
/**
* Critical conditions.
*
* Example: Application component unavailable, unexpected exception.
*
* @param string|\Stringable $message
* @param mixed[] $context
*
* @return void
*/
public function critical(string|\Stringable $message, array $context = []): void;
/**
* Runtime errors that do not require immediate action but should typically
* be logged and monitored.
*
* @param string|\Stringable $message
* @param mixed[] $context
*
* @return void
*/
public function error(string|\Stringable $message, array $context = []): void;
/**
* 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|\Stringable $message
* @param mixed[] $context
*
* @return void
*/
public function warning(string|\Stringable $message, array $context = []): void;
/**
* Normal but significant events.
*
* @param string|\Stringable $message
* @param mixed[] $context
*
* @return void
*/
public function notice(string|\Stringable $message, array $context = []): void;
/**
* Interesting events.
*
* Example: User logs in, SQL logs.
*
* @param string|\Stringable $message
* @param mixed[] $context
*
* @return void
*/
public function info(string|\Stringable $message, array $context = []): void;
/**
* Detailed debug information.
*
* @param string|\Stringable $message
* @param mixed[] $context
*
* @return void
*/
public function debug(string|\Stringable $message, array $context = []): void;
/**
* Logs with an arbitrary level.
*
* @param mixed $level
* @param string|\Stringable $message
* @param mixed[] $context
*
* @return void
*
* @throws \Psr\Log\InvalidArgumentException
*/
public function log($level, string|\Stringable $message, array $context = []): void;
}
Developer
To ensure a smooth integration process and optimal performance, follow these best practices: