Quick start

Two minimal walkthroughs that cover the most common use cases:

• Create file — build a new XLSX from scratch.
• Read file — open an existing XLSX and iterate its rows.
• Close manually — explicitly release file handles and native resources in long-running scripts.

Both examples use the Vtiful\Kernel\Excel class. Read-side features require building the extension with --enable-reader (the default in PECL packages).