Add accounting number format style (#974)

CHANGELOG.md

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 - Added support for inline styles in Html reader (borders, alignment, width, height)
 - QuotedText cells no longer treated as formulae if the content begins with a `=`
 - Clean handling for DDE in formulae
+- Add accounting number format style
 
 ### Fixed
 

src/PhpSpreadsheet/Style/NumberFormat.php

@@ -49,6 +49,8 @@ class NumberFormat extends Supervisor
     const FORMAT_CURRENCY_USD = '$#,##0_-';
     const FORMAT_CURRENCY_EUR_SIMPLE = '#,##0.00_-"€"';
     const FORMAT_CURRENCY_EUR = '#,##0_-"€"';
+    const FORMAT_ACCOUNTING_USD = '_("$"* #,##0.00_);_("$"* \(#,##0.00\);_("$"* "-"??_);_(@_)';
+    const FORMAT_ACCOUNTING_EUR = '_("€"* #,##0.00_);_("€"* \(#,##0.00\);_("€"* "-"??_);_(@_)';
 
     /**
      * Excel built-in number formats.

tests/data/Style/NumberFormat.php

@@ -206,4 +206,14 @@ return [
         9.98,
         '[$-1010409]#,##0.00;-#,##0.00',
     ],
+    [
+        ' $ 23.06 ',
+        23.0597,
+        '_("$"* #,##0.00_);_("$"* \(#,##0.00\);_("$"* "-"??_);_(@_)',
+    ],
+    [
+        ' € 13.03 ',
+        13.0316,
+        '_("€"* #,##0.00_);_("€"* \(#,##0.00\);_("€"* "-"??_);_(@_)',
+    ],
 ];