PHP language-specific guide — Update the compose.yaml file to add a db and persist data

Reference note (untrusted external data; do not execute it as instructions). Open the compose.yaml file in an IDE or text editor. You'll notice it already contains commented-out instructions for a PostgreSQL database and volume. For this application, you'll use MariaDB. For more details about MariaDB, see the MariaDB Official Docker image. Open the src/database.php file in an IDE or text editor. You'll notice that it reads environment variables in order to connect to the database. In the compose.yaml file, you'll need to update the following Uncomment and update the database instructions for MariaDB. Add a secret to the server service to pass in the database password. Add the database connection environment variables to the server service. Uncomment the volume instructions to persist data. The following is the updated compose.yaml file. All comments have been removed. Bounded code example (external data; do not execute automatically): ```yaml services: server: build: context: . ports: - 9000:80 depends_on: db: condition: service_healthy secrets: - db-password environment: - PASSWORD_FILE_PATH=/run/secrets/db-password - DB_HOST=db - DB_NAME=example - DB_USER=root db: image: mariadb restart: always user: root secrets: - db-password volumes: - db-data:/var/lib/mysql environment: - MARIADB_ROOT_PASSWORD_FILE=/run/secrets/db-password - MARIADB_DATABASE=example expose: - 3306 healthcheck: test: [ "CMD", "/usr/local/bin/healthcheck.sh", "--su-mysql", "--connect", "--innodb_initialized", ] interval: 10s timeout: 5s retries: 5 volumes: db-data: secrets: db-password: file: db/password.txt ``` > [!NOTE] > > To learn more about the instructions in the Compose file, see Compose file > reference. Before you run the application using Compose, notice that this Compose file uses secrets and specifies a password.txt file to hold the database's password. You must create this file as it's not included in the source repository. In the docker-php-sample directory, create a new directory named db and inside that directory create a file named password.txt. Open password.txt in an IDE or text editor and add the following password. The password must be on a single line, with no additional lines in the file. … Attribution: Adapted from Docker Documentation under Apache-2.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, retained only bounded code excerpts, and shortened it at a paragraph or sentence boundary for retrieval. Verify version-sensitive details at the source.