Custom PHPStan Error Formatters

Installation

1. Run composer require --dev nicksdot/phpstan-phpstorm-error-identifiers
2. Then add the formatter(s) you want to the services section in your phpstan.neon

PHPStan error identifiers in PhpStorm inspection output

Usage

1. Add the service to phpstan.neon:

services:
	errorFormatter.checkstyle:
		class:  NickSdot\PhpStanPhpStormErrorIdentifiers\CheckstyleErrorFormatterPhpStorm

That's it, PHPStorm will automatically use it. And here is how it looks like:

LLM Error Formatter

The output of the PHPStan LLM error formatter is optimised for LLMs, resulting in 40–60% less token usage compared to the default RawErrorFormatter output.

Real-life Example (210 errors):

Formatter	Token	Characters
TableErrorFormatter	11,693	132,882
RawErrorFormatter	9,265	35,794
LlmErrorFormatter	4,316	18,245

Usage

1. Add the service to phpstan.neon:

services:
	errorFormatter.llm:
		class: NickSdot\PhpStanPhpStormErrorIdentifiers\LlmErrorFormatter

2. Run PHPStan with the --error-format=llm flag.