[](https://packagist.org/packages/vimeo/psalm) [](https://travis-ci.org/vimeo/psalm/branches) Psalm is a static analysis tool for finding errors in PHP applications. - **v0.3.x** supports checking PHP 5.4 - 7.1 code, and requires **PHP 5.5+** to run. - **v0.2.x** supports checking PHP 5.4 - 7.0 code and requires **PHP 5.4+** to run. Check out the [wiki](https://github.com/vimeo/psalm/wiki) or [try a live demo](https://getpsalm.org/)! ## Quickstart Guide Install via [Composer](https://getcomposer.org/): ```bash composer require --dev vimeo/psalm ``` Add a config: ```bash ./vendor/bin/psalm --init ``` Then run Psalm: ```bash ./vendor/bin/psalm ``` The config created above will show you all issues in your code, but will emit `INFO` issues (as opposed to `ERROR`) for certain common trivial code problems. If you want a more lenient config you can specify the level with ```bash ./vendor/bin/psalm --init [source_dir] [level] ``` You can also [learn how to suppress certain issues](https://github.com/vimeo/psalm/wiki/Dealing-with-code-issues). ## Acknowledgements The engineering team [@vimeo](https://github.com/vimeo) for encouragement and patience, especially [@nbeliard](https://github.com/nbeliard), [@erunion](https://github.com/erunion) and [@nickyr](https://github.com/nickyr). Thanks also to [@nikic](https://github.com/nikic) for creating the excellent [php-parser](https://github.com/nikic/php-parser), on top of which Psalm is built.