How can I enable legacy mysql

[electricmessiah]

I'm trying to get some old sites working that use deprecated mysql_connect(). Is there an environment var I can use in my stack to enable the legacy 5.6 mysql as the example below?

PHP 5.6 was the last version to support the original mysql_connect() function. 
If your WordPress site is very old (pre-v3.9), it must have the mysql extension, not just mysqli. 

environment:
      - PHP_EXTENSIONS=mysql mysqli pdo_mysql

[electricmessiah]

Solved with this, but is there an easier/cleaner way?

entrypoint: ["/bin/sh", "-c"]
    command: 
      - |
        if command -v phpaddmod >/dev/null 2>&1; then
          phpaddmod mysql mysqli pdo_mysql
        elif command -v php-extension >/dev/null 2>&1; then
          php-extension install mysql mysqli pdo_mysql
        else
          echo "No helper found, attempting manual enable"
          docker-php-ext-install mysql mysqli pdo_mysql
        fi
        /usr/local/sbin/php-fpm