add postgres support.

Dockerfile

@@ -1,7 +1,7 @@
 FROM php:7.4-apache
 
 RUN set -eux; apt-get update; \
-	apt-get install -y --no-install-recommends \
+	apt-get install -y --no-install-recommends libpq-dev \
 	#
 	# install curl
 	libcurl4-openssl-dev \
@@ -18,7 +18,7 @@ RUN set -eux; apt-get update; \
 	--with-jpeg --with-webp --with-xpm --with-freetype; \
 	#
 	# install extensions
-	docker-php-ext-install curl gd pdo pdo_mysql exif; \
+	docker-php-ext-install curl gd pdo pdo_mysql pdo_pgsql exif; \
 	#
 	# set up environment
 	a2enmod rewrite;

README.md

@@ -73,12 +73,82 @@ services:
       - ./data:/var/www/html/data
 ```
 
-## Install standalone app using `docker-compose` with mysql
+## Install standalone app using `docker-compose`
 You need to install [docker-compose](https://docs.docker.com/compose/install/).
 
-### Step 1: Download and run `docker-compose.yml`.
+### MySQL
+```yaml
+version: "3"
+services:
+  webserver:
+    image: m1k1o/blog:latest
+    container_name: blog_apache
+    environment:
+      TZ: Europe/Vienna
+      BLOG_DB_CONNECTION: mysql
+      BLOG_MYSQL_HOST: mariadb
+      BLOG_MYSQL_PORT: 3306
+      BLOG_MYSQL_USER: blog
+      BLOG_MYSQL_PASS: blog # use secure password
+      BLOG_DB_NAME: blog
+    restart: unless-stopped
+    ports:
+      - ${HTTP_PORT-80}:80
+    volumes: 
+      - ${DATA-./data}:/var/www/html/data
+  mariadb:
+    image: mariadb:10.1
+    container_name: blog_mariadb
+    environment:
+      MYSQL_USER: blog
+      MYSQL_PASSWORD: blog # use secure password
+      MYSQL_DATABASE: blog
+      MYSQL_ROOT_PASSWORD: root # use secure password
+    restart: unless-stopped
+    volumes:
+      - mariadb:/var/lib/mysql
+      - ./app/db/mysql:/docker-entrypoint-initdb.d:ro
+volumes:
+  mariadb:
+```
+
+### Postgres
+```yaml
+version: "3"
+services:
+  webserver:
+    image: m1k1o/blog:latest
+    container_name: blog_apache
+    environment:
+      TZ: Europe/Vienna
+      BLOG_DB_CONNECTION: postgres
+      BLOG_POSTGRES_HOST: postgres
+      BLOG_POSTGRES_PORT: 5432
+      BLOG_POSTGRES_USER: blog
+      BLOG_POSTGRES_PASS: blog # use secure password
+      BLOG_DB_NAME: blog
+    restart: unless-stopped
+    ports:
+      - ${HTTP_PORT-80}:80
+    volumes: 
+      - ${DATA-./data}:/var/www/html/data
+  postgres:
+    image: postgres:14
+    container_name: blog_postgres
+    environment:
+      POSTGRES_USER: blog
+      POSTGRES_PASSWORD: blog # use secure password
+      POSTGRES_DB: blog
+    restart: unless-stopped
+    volumes:
+      - postgres:/var/lib/postgresql/data
+      - ./app/db/postgres:/docker-entrypoint-initdb.d:ro
+volumes:
+  postgres:
+```
+
+### Step 1: Run `docker-compose.yml`.
 ```sh
-wget https://raw.githubusercontent.com/m1k1o/blog/master/docker-compose.yml
 docker-compose up -d
 ```
 

app/db.class.php

@@ -41,6 +41,9 @@ class DB
 			case 'mysql':
 				$this->mysql_connect();
 				break;
+			case 'postgres':
+				$this->postgres_connect();
+				break;
 			case 'sqlite':
 				$this->sqlite_connect();
 				break;
@@ -92,6 +95,48 @@ class DB
 		}
 	}
 
+	private final function postgres_connect(){
+		$host = Config::get_safe('postgres_host', false);
+		$port = Config::get_safe('postgres_port', false);
+		$socket = Config::get_safe('postgres_socket', false);
+
+		if($socket === false && $host === false){
+			throw new DBException("Postgres host or socket must be defined.");
+		}
+
+		// Try to connect
+		try {
+			$this->_PDO = new \PDO(
+				// Server
+				'pgsql:'.
+					($socket !== false
+						? 'unix_socket='.$socket
+						: 'host='.$host.($port !== false ? ';port='.$port : '')
+					).
+				// DB
+				';dbname='.Config::get('db_name').
+				// Charset
+				';options=\'--client_encoding=UTF8\'',
+				// Username
+				Config::get('postgres_user'),
+				// Password
+				Config::get_safe('postgres_pass', ''),
+				// Set attributes
+				[
+					\PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION,
+					\PDO::ATTR_EMULATE_PREPARES => false
+				]
+			);
+
+			$this->_PDO->exec(
+				// Set timezone
+				'SET timezone="'.date('P').'";'
+			);
+		} catch (PDOException $e) {
+			throw new DBException($e->getMessage());
+		}
+	}
+
 	private final function sqlite_connect(){
 		$sqlite_db = PROJECT_PATH.Config::get_safe('sqlite_db', "data/sqlite.db");
 
@@ -165,6 +210,11 @@ class DB
 		$sql = $params[0];
 		unset($params[0]);
 
+		// Replace backticks with " for postgres
+		if(DB::connection() === 'postgres') {
+			$sql = str_replace("`", '"', $sql);
+		}
+
 		// Debug mode
 		if(Config::get_safe('debug', false)){
 			echo "<!-- ".$sql." + ".json_encode($params)." -->\n";

config.ini

@@ -11,6 +11,15 @@ db_connection = sqlite
 ;mysql_pass = root
 ;db_name = blog
 
+;[database]
+;db_connection = postgres
+;postgres_socket = /tmp/postgres.sock
+;postgres_host = localhost
+;postgres_port = 5432
+;postgres_user = root
+;postgres_pass = root
+;db_name = blog
+
 [profile]
 title = Blog
 name = Max Musermann
@@ -63,5 +72,5 @@ logs_path = data/logs/
 [system]
 ;timezone = Europe/Vienna
 version = 1.31
-debug = false
+debug = true
 logs = false