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PHPStan Extension for Magento 1 / OpenMage

Extension for PHPStan to allow analysis of Magento 1/OpenMage code.

Usage

Add phpstan.neon to your Magento 1/OpenMage project.

Make sure it has

includes:
    - vendor/vianetz/phpstan-magento1/extension.neon

Then run

composer require --dev vianetz/phpstan-magento1

Alternative Magento path

By default this extension assumes the Magento directory is %currentWorkingDirectory%/htdocs.

You can adapt the path by changing the magentoRootDirectory parameter in the phpstan.neon file.

Example configuration file for analysing Magento Extensions

includes:
    - vendor/vianetz/phpstan-magento1/extension.neon
parameters:
    paths:
        - %currentWorkingDirectory%/htdocs/app/code/local

Known Issues

Data/SQL scripts can't be tested

Since these scripts use a presumed $this variable due to being included from a setup class, work is needed to:

  • work out the correct setup class
  • somehow make phpstan aware of it for the file

Magento fluent interface classes aren't fluent for sub-classes

This causes subsequent calls to the class object to assume the scope of the super-class that defined the return type.

This is due to their PHPDoc not using the up to date way of specifying fluency with subclasses using $this as the type.

Options to resolve:

  • Avoid using the fluent interface on these classes
  • Patch Magento code to use $this as the return type
  • Define @method PHPDoc for the called methods in the subclass
  • Add the error to the parameters.ignoreErrors phpstan configuration to ignore it - this loses the ability to properly type the subseqent methods of the fluent interface

Mage_Core_Model_Abstract::load $id is not an integer

This is due to an inadequate PHPDoc of the load method of the Mage_Core_Model_Abstract class. It should have used a "mixed" type to support when a field is specified as the 2nd argument.

PHPStan extensions have no way of altering existing method parameters.

Options to resolve:

  • Patch the Magento code to use mixed as the $id parameter type
  • If available in the chain of super-classes, use the loadBy{Field} method, which has the correct parameter typing
  • Define @method PHPDoc in your class (which extends Mage_Core_Model_Abstract or a subclass of it) with the correct parameter types
  • Add the error to the parameters.ignoreErrors phpstan configuration to ignore it