提交的内容

vendor/phpoffice/phpspreadsheet/README.md

@@ -32,7 +32,7 @@ If you are building your installation on a development machine that is on a diff
 ```json
 {
     "require": {
-        "phpoffice/phpspreadsheet": "^1.23"
+        "phpoffice/phpspreadsheet": "^1.28"
     },
     "config": {
         "platform": {
@@ -74,16 +74,20 @@ or the appropriate PDF Writer wrapper for the library that you have chosen to in
 For Chart export, we support following packages, which you will also need to install yourself using `composer require`
  - [jpgraph/jpgraph](https://packagist.org/packages/jpgraph/jpgraph) (this package was abandoned at version 4.0. 
    You can manually download the latest version that supports PHP 8 and above from [jpgraph.net](https://jpgraph.net/))
- - [mitoteam/jpgraph](https://packagist.org/packages/mitoteam/jpgraph) (fork with php 8.1 support)
+ - [mitoteam/jpgraph](https://packagist.org/packages/mitoteam/jpgraph) - up to date fork with modern PHP versions support and some bugs fixed.
 
 and then configure PhpSpreadsheet using:
 ```php
-Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\JpGraph::class); // to use jpgraph/jpgraph
+// to use jpgraph/jpgraph
+Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\JpGraph::class);
 //or
-Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\MtJpGraphRenderer::class); // to use mitoteam/jpgraph
+// to use mitoteam/jpgraph
+Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\MtJpGraphRenderer::class);
 ```
 
-One or the other of these libraries is necessary if you want to generate HTML or PDF files that include charts.
+One or the other of these libraries is necessary if you want to generate HTML or PDF files that include charts; or to render a Chart to an Image format from within your code.
+They are not necessary to define charts for writing to `Xlsx` files.
+Other file formats don't support writing Charts.
 
 ## Documentation
 
@@ -103,10 +107,15 @@ Posts already available to Patreon supporters:
 - Looping the Loop
     - Advice on Iterating through the rows and cells in a worksheet.
 
-The next post (currently being written) will be:
+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:
@@ -116,8 +125,9 @@ Planned posts for the future include topics like:
  - Array Formulae
  - Conditional Formatting
  - Data Validation
- - Formula Debugging
  - 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.