The PHP Analyzer performs static analysis on your source code to help you find errors and bugs, and also has built-in heuristics to automatically fix some of them.

Learn more in the documentation.

Please note that PHP Analyzer itself needs a PHP 5.4 runtime; this requirement only applies to the system that is running PHP Analyzer, not the code that is analyzed.

PHPAnalyzer can be installed via composer very easily:

composer create-project scrutinizer/php-analyzer:dev-master

PHPAnalyzer can also be embedded in an existing project:

{
    "repositories": [
        {
            "type": "vcs",
            "url": "https://github.com/schmittjoh/PHP-Parser"
        }
    ],
    "require-dev": {
        "scrutinizer/php-analyzer": "*@dev",
        "scrutinizer/utils": "*@dev",
        "jms/php-manipulator": "*@dev",
        "nikic/php-parser": "*@dev"
    }
}

php bin/phpalizer run some-dir

The CLI is especially useful to analyze smaller libraries, or for testing purposes.