Make sure to pass a string to GU::trimExplode() #198

	name: CI

	on: [push, pull_request]

	jobs:
	build:

	runs-on: ubuntu-latest

	strategy:
	matrix:
	env:
	# See version matrix @ https://typo3.org/cms/roadmap
	- { php: 8.1, typo3: 11 }
	- { php: 8.1, typo3: 12 }
	- { php: 8.3, typo3: 13 }

	env: ${{ matrix.env }}

	steps:
	- uses: actions/checkout@v1

	- name: Set up PHP Version
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.env.php }}
	tools: composer:v2

	- name: Lint PHP files
	run: find .php Classes -name '.php' -print0 \| xargs -0 -n 1 -P 4 php -l

	- name: Validate composer.json and composer.lock
	run: composer validate

	- name: Cache dependencies
	uses: actions/cache@v1
	with:
	path: ~/.composer/cache
	key: dependencies-composer-${{ hashFiles('composer.json') }}

	- name: Install composer dependencies
	run: \|
	composer require typo3/cms-core:^$typo3 typo3/cms-frontend:^$typo3 typo3/cms-backend:^$typo3

	- name: Run PHPStan
	run: composer phpstan

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