Single-quoted strings with [ ] in Laravel Log interpreting escape characters (\r \n)

[Yousha]

Laravel Version

11.30.0

PHP Version

8.3.13 64bit TS

Database Driver & Version

No response

Description

When logging with single-quoted ' strings that containing escape characters like \r and [ ], they are being interpreted in the log output. This results in unexpected behavior, such as \r being converted to a carriage return, even though single-quoted strings in PHP treat backslashes as literal characters.

Using Illuminate\Support\Facades\Log
With default logging configuration.

Steps To Reproduce

1- Download and create a Laravel 11 application project. (https://laravel.com/docs/11.x)

2- In any route, controller, or model file, log a string using single-quotes with a backslash \r and bracket [ ].
Example:
Log::info('[MyNamespace\routes\non-web\application]');

3- Check the Laravel log file.

Expected output

local.INFO: [MyNamespace\routes\non-web\application]

Actual output

local.INFO: [MyNamespace
outes
on-web\application]

[github-actions]

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If possible, please make a pull request fixing the issue you have described, along with corresponding tests. All pull requests are promptly reviewed by the Laravel team.

Thank you!

[cosmastech]

I think the issue here is caused by this: https://github.com/Seldaek/monolog/blob/32e515fdc02cdafbe4593e30a9350d486b125b67/src/Monolog/Formatter/LineFormatter.php#L241

If the first character in the log is [ or { then it replaces those substrings with "\n"