Ignore cell formatting when the format is a single @

This commit fix two issues that happened when the a cell was formatted as text
* When the cell contains a number prefixed with dollar sign, this number is getting replaced with 0. The replacement happens due to the preg_replace function.
* When the cell contains quotes, the quote would be removed.

CHANGELOG.md

@@ -25,7 +25,7 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 ### Fixed
 
-- Nothing yet.
+- Ignore cell formatting when the format is a single @. [Issue #4242](https://github.com/PHPOffice/PhpSpreadsheet/issues/4242) [PR #4243](https://github.com/PHPOffice/PhpSpreadsheet/pull/4243)
 
 ## 2024-11-22 - 3.5.0
 

src/PhpSpreadsheet/Style/NumberFormat/Formatter.php

@@ -124,9 +124,13 @@ public static function toFormattedString($value, string $format, ?array $callBac
             return $value ? Calculation::getTRUE() : Calculation::getFALSE();
         }
         // For now we do not treat strings in sections, although section 4 of a format code affects strings
-        // Process a single block format code containing @ for text substitution
-        if (preg_match(self::SECTION_SPLIT, $format) === 0 && preg_match(self::SYMBOL_AT, $format) === 1) {
-            return str_replace('"', '', preg_replace(self::SYMBOL_AT, (string) $value, $format) ?? '');
+        // Process a single block format code containing @ for text substitution, but ignore if the whole format is @
+        if (
+            $format != '@'
+            && preg_match(self::SECTION_SPLIT, $format) === 0
+            && preg_match(self::SYMBOL_AT, $format) === 1
+        ) {
+            return str_replace('"', '', preg_replace(self::SYMBOL_AT, $value, $format) ?? '');
         }
 
         // If we have a text value, return it "as is"

tests/PhpSpreadsheetTests/Worksheet/ToArrayTest.php

@@ -5,6 +5,7 @@
 namespace PhpOffice\PhpSpreadsheetTests\Worksheet;
 
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Style\NumberFormat;
 use PHPUnit\Framework\TestCase;
 
 class ToArrayTest extends TestCase
@@ -76,4 +77,46 @@ public static function testMaxCol(): void
         self::assertSame('start', $array[0][0]);
         self::assertSame('end', $array[0][16383]);
     }
+
+    public static function testDollarSign(): void
+    {
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $inputArray = [
+            ['General', '$0', 'Value is $100', '200 number - $200 value'],
+            ['Text', '$0', 'Value is $100', '200 number - $200 value'],
+        ];
+
+        $sheet->fromArray($inputArray, null, 'A1', true);
+
+        $sheet->getStyle('A2:D2')->getNumberFormat()->setFormatCode(NumberFormat::FORMAT_TEXT);
+
+        $expected = [
+            ['General', '$0', 'Value is $100', '200 number - $200 value'],
+            ['Text', '$0', 'Value is $100', '200 number - $200 value'],
+        ];
+        $result = $sheet->rangeToArray('A1:D2');
+        self::assertSame($expected, $result);
+    }
+
+    public static function testQuotes(): void
+    {
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $inputArray = [
+            ['General', '"'],
+            ['Text', '"'],
+        ];
+
+        $sheet->fromArray($inputArray, null, 'A1', true);
+
+        $sheet->getStyle('A2:B2')->getNumberFormat()->setFormatCode(NumberFormat::FORMAT_TEXT);
+
+        $expected = [
+            ['General', '"'],
+            ['Text', '"'],
+        ];
+        $result = $sheet->rangeToArray('A1:B2');
+        self::assertSame($expected, $result);
+    }
 }