NullLogger

This Logger can be used to avoid conditional log calls.

Logging should always be optional, and if no logger is provided to your library creating a NullLogger instance to have something to throw logs at is a good way to avoid littering your code with if ($this->logger) { } blocks.

• Full name: \Psr\Log\NullLogger
• Parent class: \Psr\Log\AbstractLogger

Methods

log

Logs with an arbitrary level.

public log(mixed $level, string|\Stringable $message, array $context = []): void

Parameters:

Parameter	Type	Description
$level	mixed
$message	string|\Stringable
$context	array

Throws:

• InvalidArgumentException

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Inherited methods

emergency

System is unusable.

public emergency(string|\Stringable $message, array $context = []): void

Parameters:

Parameter	Type	Description
$message	string|\Stringable
$context	array

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alert

Action must be taken immediately.

public alert(string|\Stringable $message, array $context = []): void

Example: Entire website down, database unavailable, etc. This should trigger the SMS alerts and wake you up.

Parameters:

Parameter	Type	Description
$message	string|\Stringable
$context	array

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critical

Critical conditions.

public critical(string|\Stringable $message, array $context = []): void

Example: Application component unavailable, unexpected exception.

Parameters:

Parameter	Type	Description
$message	string|\Stringable
$context	array

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error

Runtime errors that do not require immediate action but should typically be logged and monitored.

public error(string|\Stringable $message, array $context = []): void

Parameters:

Parameter	Type	Description
$message	string|\Stringable
$context	array

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warning

Exceptional occurrences that are not errors.

public warning(string|\Stringable $message, array $context = []): void

Example: Use of deprecated APIs, poor use of an API, undesirable things that are not necessarily wrong.

Parameters:

Parameter	Type	Description
$message	string|\Stringable
$context	array

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notice

Normal but significant events.

public notice(string|\Stringable $message, array $context = []): void

Parameters:

Parameter	Type	Description
$message	string|\Stringable
$context	array

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info

Interesting events.

public info(string|\Stringable $message, array $context = []): void

Example: User logs in, SQL logs.

Parameters:

Parameter	Type	Description
$message	string|\Stringable
$context	array

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debug

Detailed debug information.

public debug(string|\Stringable $message, array $context = []): void

Parameters:

Parameter	Type	Description
$message	string|\Stringable
$context	array

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log

Logs with an arbitrary level.

public log(mixed $level, string|\Stringable $message, array $context = []): void

• This method is abstract.

Parameters:

Parameter	Type	Description
$level	mixed
$message	string|\Stringable
$context	array

Throws:

• InvalidArgumentException

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Automatically generated on 2025-03-18