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api/vendor/phpoffice/phpspreadsheet/README.md

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+# PhpSpreadsheet
+
+[![Build Status](https://github.com/PHPOffice/PhpSpreadsheet/workflows/main/badge.svg)](https://github.com/PHPOffice/PhpSpreadsheet/actions)
+[![Code Quality](https://scrutinizer-ci.com/g/PHPOffice/PhpSpreadsheet/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/PHPOffice/PhpSpreadsheet/?branch=master)
+[![Code Coverage](https://scrutinizer-ci.com/g/PHPOffice/PhpSpreadsheet/badges/coverage.png?b=master)](https://scrutinizer-ci.com/g/PHPOffice/PhpSpreadsheet/?branch=master)
+[![Total Downloads](https://img.shields.io/packagist/dt/PHPOffice/PhpSpreadsheet)](https://packagist.org/packages/phpoffice/phpspreadsheet)
+[![Latest Stable Version](https://img.shields.io/github/v/release/PHPOffice/PhpSpreadsheet)](https://packagist.org/packages/phpoffice/phpspreadsheet)
+[![License](https://img.shields.io/github/license/PHPOffice/PhpSpreadsheet)](https://packagist.org/packages/phpoffice/phpspreadsheet)
+[![Join the chat at https://gitter.im/PHPOffice/PhpSpreadsheet](https://img.shields.io/badge/GITTER-join%20chat-green.svg)](https://gitter.im/PHPOffice/PhpSpreadsheet)
+
+PhpSpreadsheet is a library written in pure PHP and offers a set of classes that
+allow you to read and write various spreadsheet file formats such as Excel and LibreOffice Calc.
+
+## Installation
+
+See the [install instructions](https://phpspreadsheet.readthedocs.io/en/latest/#installation).
+
+## Documentation
+
+Read more about it, including install instructions, in the [official documentation](https://phpspreadsheet.readthedocs.io). Or check out the [API documentation](https://phpoffice.github.io/PhpSpreadsheet).
+
+Please ask your support questions on [StackOverflow](https://stackoverflow.com/questions/tagged/phpspreadsheet), or have a quick chat on [Gitter](https://gitter.im/PHPOffice/PhpSpreadsheet).
+
+## Patreon
+
+I am now running a [Patreon](https://www.patreon.com/MarkBaker) to support the work that I do on PhpSpreadsheet.
+
+Supporters will receive access to articles about working with PhpSpreadsheet, and how to use some of its more advanced features.
+
+Posts already available to Patreon supporters:
+ - The Dating Game
+   - A  look at how MS Excel (and PhpSpreadsheet) handle date and time values.
+- Looping the Loop
+    - Advice on Iterating through the rows and cells in a worksheet.
+
+And for Patrons at levels actively using PhpSpreadsheet:
+ - Behind the Mask
+   - A look at Number Format Masks.
+
+The Next Article (currently Work in Progress):
+ - Formula for Success
+   - How to debug formulae that don't produce the expected result.
+
+
+My aim is to post at least one article each month, taking a detailed look at some feature of MS Excel and how to use that feature in PhpSpreadsheet, or on how to perform different activities in PhpSpreadsheet.
+
+Planned posts for the future include topics like:
+ - Tables
+ - Structured References
+ - AutoFiltering
+ - Array Formulae
+ - Conditional Formatting
+ - Data Validation
+ - Value Binders
+ - Images
+ - Charts
+
+After a period of six months exclusive to Patreon supporters, articles will be incorporated into the public documentation for the library.
+
+## PHPExcel vs PhpSpreadsheet ?
+
+PhpSpreadsheet is the next version of PHPExcel. It breaks compatibility to dramatically improve the code base quality (namespaces, PSR compliance, use of latest PHP language features, etc.).
+
+Because all efforts have shifted to PhpSpreadsheet, PHPExcel will no longer be maintained. All contributions for PHPExcel, patches and new features, should target PhpSpreadsheet `master` branch.
+
+Do you need to migrate? There is [an automated tool](/docs/topics/migration-from-PHPExcel.md) for that.
+
+## License
+
+PhpSpreadsheet is licensed under [MIT](https://github.com/PHPOffice/PhpSpreadsheet/blob/master/LICENSE).