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Static Code Analysis

PHPStan

ILIAS uses PHPStan as an optional tool for developers to find errors in the ILIAS code base without actually running it.

Configuration

To provide a common configuration a shared config file is located in ./scripts/PHPStan/phpstan.neon.

PHPStan provides the possibility to analyse the code based on specfic rule levels. The level used in ILIAS is level 6, which includes the reporting of missing typehints. To prevent False Positives beingt reported related to global constants, developers can extend the constant collection defined in the constants.php

Analysis

To run PHPStan you just need to execute the bash script:

./scripts/PHPStan/run_check.sh

To run PHPStan in the context of a specific component, pass the respective folder name as argument:

./scripts/PHPStan/run_check.sh components/ILIAS/Mail

You can overwrite the rule level by passing a --level argument:

./scripts/PHPStan/run_check.sh components/ILIAS/Mail --level 3

Custom Configuration File

A custom configuration file could be provided by adding a file named phpstan.local.neon to the ILIAS root directory. The filename is ignored by the .gitignore file and ILIAS \RootFolderTest, which ensures no new files are added to the root level of ILIAS.

Example:

includes:
    - scripts/PHPStan/phpstan.neon
parameters:
    level: 9

In this example the shared PHPStan configuration is extended by the local configuration, where we defined stricter rule level.

Baseline

A baseline file can be generated by using the --generate-baseline option.

/scripts/PHPStan/run_check.sh -c phpstan.local.neon components/ILIAS/Mail --generate-baseline

The generated baseline file phpstan-baseline.neon will be stored in the ILIAS root folder and must be included in the local phpstan.local.neon configuration.

includes:
    - scripts/PHPStan/phpstan.neon
    - phpstan-baseline.neon
parameters:
    level: 9

If you analyse different components/folders with PHPStan, you will need to generate a new baseline file.

IDE Integration

PHPStorm

See: https://www.jetbrains.com/help/phpstorm/using-phpstan.html