Avoid a PHP Notice: Undefined index: tix_attendee_id (#1430) #1585

	name: Static Analysis (Linting)

	# Run on any changes in public_html
	on:
	pull_request:
	paths:
	- public_html/**
	push:
	branches: [production]
	paths:
	- public_html/**

	jobs:
	check:
	name: All

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0

	- uses: actions/cache@v2
	with:
	path: '**/node_modules'
	key: ${{ runner.os }}-modules-${{ hashFiles('**/yarn.lock') }}

	- name: Use Node.js 16.x
	uses: actions/setup-node@v2-beta
	with:
	node-version: 16.x

	- name: composer install
	run: \|
	composer install

	- name: yarn install and build
	run: \|
	yarn
	yarn workspaces run build

	- name: Lint JavaScript and Styles
	run: \|
	yarn workspaces run lint:js
	yarn workspaces run lint:css

	- name: Lint PHP
	run: \|
	BASE_REF=${{ github.base_ref }} php .github/bin/phpcs-branch.php

Provide feedback