Build a PHP image with pinned dependencies and separate image creation from runtime configuration.
What It Does and When to Use It
Run the relevant deployment or container command in the intended trusted environment. A build artifact contains immutable application code, while production configuration and secrets are injected at runtime.
Requirements, Inputs and Expected Behavior
Confirm the runtime, extension, environment variables, and permissions before running the examples in production. Avoid mounting the host Docker socket or baking production secrets into image layers.
Example 1: Basic Operation
Run the relevant deployment or container command in the intended trusted environment.
docker build --pull -t local/php-app:20261017 .Example 2: Behavior and Validation
Confirm PHP version, extensions and INI paths in the target runtime.
php -v
php -m | grep -E 'pdo|openssl|mbstring'
php --iniPractical Example: Application Use
Check actual service health and log output; adapt host and service names to deployment.
curl -fsS http://127.0.0.1/health || exit 1
sudo journalctl -n 30 --no-pagerImportant Behavior and Edge Cases
The second example highlights: Confirm PHP version, extensions and INI paths in the target runtime. The practical example adds: Check actual service health and log output; adapt host and service names to deployment.
Comparison with Related Approaches
| Approach | What changes |
|---|---|
| Local build and production deployment | A build artifact contains immutable application code, while production configuration and secrets are injected at runtime. |
| Choosing safely | Pin base images and dependencies and require a health-check before routing traffic. |
Common Beginner Mistakes
| Mistake | Correct approach |
|---|---|
| Assuming successful execution proves the result is usable | Check the return value, required extension, and observable output of the specific operation. |
| Ignoring runtime and environment differences | Verify PHP version, SAPI, operating system, service access, and permissions before deployment. |
| Skipping operational constraints | Avoid mounting the host Docker socket or baking production secrets into image layers. |
Key Takeaways
- Build a PHP image with pinned dependencies and separate image creation from runtime configuration.
- Check actual service health and log output; adapt host and service names to deployment.
- Pin base images and dependencies and require a health-check before routing traffic.