Add documentation on how to use lang functions in template code #226

	name: Test make documentation

	on:
	push:
	branches:
	- master
	- '[34].[0-9]+.x'
	pull_request:
	branches:
	- master
	- '[34].[0-9]+.x'

	jobs:
	build-dev-docs:
	name: 'Build development docs'
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.x'
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install sphinx
	pip install sphinx_rtd_theme
	pip install sphinxcontrib-phpdomain
	pip install sphinx-multiversion
	pip install git+https://github.com/marc1706/sphinx-php.git
	- name: Test make html
	run: \|
	cd development
	make html

	build-user-docs-pdf:
	name: 'Build user docs PDF'
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Install fop
	run: \|
	sudo apt-get install -y fop
	- name: Build pdf documentation
	working-directory: ${{ github.workspace }}/documentation
	run: \|
	./create_pdf.sh
	- name: Archive PDF output
	uses: actions/upload-artifact@v4
	with:
	name: Documentation PDF
	path: ${{ github.workspace }}/documentation/*.pdf

	build-user-docs-website:
	name: 'Build user docs for website'
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Install xsltproc
	run: \|
	sudo apt-get install -y xsltproc
	- name: Build documentation for website
	working-directory: ${{ github.workspace }}/documentation
	run: \|
	mkdir build_website
	./create_docs.sh build_website

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