Add PHP lint problem matcher #141

	name: PHP Syntax Check

	on:
	push:
	branches: [ smf21, master ]
	pull_request:
	branches: [ smf21, master ]

	workflow_dispatch:
	jobs:
	syntax-checker:
	runs-on: ${{ matrix.operating-system }}
	strategy:
	matrix:
	operating-system: [ ubuntu-latest ]
	php: [ '7.4', '8.0', '8.1', '8.2' ]
	name: PHP ${{ matrix.php }} Syntax Check
	steps:
	- uses: actions/checkout@master
	with:
	submodules: false
	- name: Add PHP lint matcher
	run: echo "::add-matcher::.github/phplint-matcher.json"
	- name: Setup PHP
	id: SetupPHP
	uses: nanasess/setup-php@master
	with:
	php-version: ${{ matrix.php }}
	- name: Lint PHP files
	run: \|
	shopt -s globstar
	for f in */.php; do
	php -l "$f"
	done

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