Xfrocks/Api on PHP 5.6.34

docker-compose.yml

version: '2.3'

services:
  php:
    build:
      context: .
    links:
      - mysql
    ports:
      - '80:80'
    volumes:
      - ./xenforo:/var/www/html

  mysql:
    image: mysql:5.7.23
    environment:
      MYSQL_DATABASE: xenforo2
      MYSQL_ROOT_PASSWORD: root
    ports:
      - '3306:3306'
    volumes:
      - .data/mysql:/var/lib/mysql

Dockerfile

FROM php:5.6.34-apache

RUN apt-get update && apt-get install --no-install-recommends -y mysql-client

RUN docker-php-ext-install mysqli