Glossary

Workload

An application or task running in a cluster, usually managed by a Deployment, StatefulSet or Job. Controller choice follows the workload lifecycle.

World Wide Web

WWW

World Wide Web

A system of resources accessible through addresses and hyperlinks. The web is not the entire Internet; a backend may also expose CLI or broker interfaces.

Write-ahead log

WAL

Write-Ahead Log

A change log used by a database for durability and recovery under its protocol. Size, retention and archiving matter for backup and restoration.

WSL

WSL

Windows Subsystem for Linux

WSL2

Windows Subsystem for Linux 2

A Linux environment on Windows, useful for shell scripts and consistent tooling. It is not automatic secret protection.

Xdebug

A PHP extension providing stepping/debugging capabilities. IDE and interpreter connectivity must be configured; a Composer entry does not install the extension.

XSS

XSS

Cross-Site Scripting

Execution of untrusted script in a page’s context. Render data as text or use appropriate encoding and sanitization; CSP is an additional layer, not a substitute.

YAGNI

YAGNI

You Aren’t Gonna Need It

Do not pay for a feature without a real requirement. Tests, security and cleanup needed by the current feature are not speculative extras.

YAML

YAML

YAML Ain't Markup Language

A text data format used in configuration and manifests. Valid syntax does not prove policy correctness, controller operation or deployment safety.

Zend Thread Safety

ZTS

Zend Thread Safety

NTS

Non-Thread-Safe

A PHP build variant for environments requiring multiple threads. Match ZTS/NTS to the runtime and SAPI; ZTS does not automatically isolate request state.

ZIP archive

ZIP is an archive-format name, not an acronym requiring expansion.

A file containing other files and directories, usually compressed. Extraction restores the package structure; it does not install runtimes, dependencies or Git history. Extract a new package separately to preserve your work.

Zoned date and time

A local date and time associated with a timezone such as Europe/Warsaw, its rules and a resolved offset. Adding a calendar day need not mean adding 24 elapsed hours.