PHPOffice · oleibman · Sep 12, 2025 · Sep 10, 2025 · Sep 10, 2025 · Sep 10, 2025
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -25,14 +25,16 @@ and this project adheres to [Semantic Versioning](https://semver.org). Thia is a
 
 ### Deprecated
 
-- Nothing yet.
+- Worksheet::getHashInt serves no useful purpose. No replacement.
+- Spreadsheet::getId serves no useful purpose. No replacement.
 
 ### Fixed
 
 - Performance improvement when working with large amounts of cells. [Issue #4607](https://github.com/PHPOffice/PhpSpreadsheet/issues/4607) [PR #4609](https://github.com/PHPOffice/PhpSpreadsheet/pull/4609)
 - Minor improvements to Calculation coverage. [PR #4624](https://github.com/PHPOffice/PhpSpreadsheet/pull/4624)
 - Conditional formatting in extLst. [Issue #4629](https://github.com/PHPOffice/PhpSpreadsheet/issues/4629) [PR #4633](https://github.com/PHPOffice/PhpSpreadsheet/pull/4633)
 - Php8.5 deprecates use of null as array index. [PR #4634](https://github.com/PHPOffice/PhpSpreadsheet/pull/4634)
+- For Php8.5, replace one of our two uses of `__wakeup` with `__unserialize`, and eliminate the other. [PR #4639](https://github.com/PHPOffice/PhpSpreadsheet/pull/4639)
 - Use prefix _xlfn for BASE function. [Issue #4638](https://github.com/PHPOffice/PhpSpreadsheet/issues/4638) [PR #4641](https://github.com/PHPOffice/PhpSpreadsheet/pull/4641)
 
 ## 2025-09-03 - 5.1.0

diff --git a/src/PhpSpreadsheet/ReferenceHelper.php b/src/PhpSpreadsheet/ReferenceHelper.php
@@ -1045,7 +1045,7 @@ private function updateNamedRange(DefinedName $definedName, Worksheet $worksheet
     {
         $cellAddress = $definedName->getValue();
         $asFormula = ($cellAddress[0] === '=');
-        if ($definedName->getWorksheet() !== null && $definedName->getWorksheet()->getHashInt() === $worksheet->getHashInt()) {
+        if ($definedName->getWorksheet() === $worksheet) {
             /**
              * If we delete the entire range that is referenced by a Named Range, MS Excel sets the value to #REF!
              * PhpSpreadsheet still only does a basic adjustment, so the Named Range will still reference Cells.
@@ -1064,7 +1064,7 @@ private function updateNamedRange(DefinedName $definedName, Worksheet $worksheet
 
     private function updateNamedFormula(DefinedName $definedName, Worksheet $worksheet, string $beforeCellAddress, int $numberOfColumns, int $numberOfRows): void
     {
-        if ($definedName->getWorksheet() !== null && $definedName->getWorksheet()->getHashInt() === $worksheet->getHashInt()) {
+        if ($definedName->getWorksheet() === $worksheet) {
             /**
              * If we delete the entire range that is referenced by a Named Formula, MS Excel sets the value to #REF!
              * PhpSpreadsheet still only does a basic adjustment, so the Named Formula will still reference Cells.

diff --git a/src/PhpSpreadsheet/Shared/XMLWriter.php b/src/PhpSpreadsheet/Shared/XMLWriter.php
@@ -39,6 +39,10 @@ public function __construct(int $temporaryStorage = self::STORAGE_MEMORY, ?strin
             if (empty($this->tempFileName) || $this->openUri($this->tempFileName) === false) {
                 // Fallback to memory...
                 $this->openMemory();
+                if ($this->tempFileName != '') {
+                    @unlink($this->tempFileName);
+                }
+                $this->tempFileName = '';
             }
         }
 
@@ -60,7 +64,8 @@ public function __destruct()
         }
     }
 
-    public function __wakeup(): void
+    /** @param mixed[] $data */
+    public function __unserialize(array $data): void
     {
         $this->tempFileName = '';
 

diff --git a/src/PhpSpreadsheet/Spreadsheet.php b/src/PhpSpreadsheet/Spreadsheet.php
@@ -735,9 +735,8 @@ public function getSheetByNameOrThrow(string $worksheetName): Worksheet
      */
     public function getIndex(Worksheet $worksheet, bool $noThrow = false): int
     {
-        $wsHash = $worksheet->getHashInt();
         foreach ($this->workSheetCollection as $key => $value) {
-            if ($value->getHashInt() === $wsHash) {
+            if ($value === $worksheet) {
                 return $key;
             }
         }
@@ -1468,6 +1467,10 @@ public function garbageCollect(): void
 
     /**
      * Return the unique ID value assigned to this spreadsheet workbook.
+     *
+     * @deprecated 5.2.0 Serves no useful purpose. No replacement.
+     *
+     * @codeCoverageIgnore
      */
     public function getID(): string
     {

diff --git a/src/PhpSpreadsheet/Worksheet/BaseDrawing.php b/src/PhpSpreadsheet/Worksheet/BaseDrawing.php
@@ -422,7 +422,7 @@ public function getHashCode(): string
         return md5(
             $this->name
             . $this->description
-            . (($this->worksheet === null) ? '' : (string) $this->worksheet->getHashInt())
+            . (($this->worksheet === null) ? '' : (string) spl_object_id($this->worksheet))
             . $this->coordinates
             . $this->offsetX
             . $this->offsetY

diff --git a/src/PhpSpreadsheet/Worksheet/Worksheet.php b/src/PhpSpreadsheet/Worksheet/Worksheet.php
@@ -306,11 +306,6 @@ class Worksheet
      */
     private ?Color $tabColor = null;
 
-    /**
-     * Hash.
-     */
-    private int $hash;
-
     /**
      * CodeName.
      */
@@ -323,7 +318,6 @@ public function __construct(?Spreadsheet $parent = null, string $title = 'Worksh
     {
         // Set parent and title
         $this->parent = $parent;
-        $this->hash = spl_object_id($this);
         $this->setTitle($title, false);
         // setTitle can change $pTitle
         $this->setCodeName($this->getTitle());
@@ -380,11 +374,6 @@ public function __destruct()
         unset($this->rowDimensions, $this->columnDimensions, $this->tableCollection, $this->drawingCollection, $this->chartCollection, $this->autoFilter);
     }
 
-    public function __wakeup(): void
-    {
-        $this->hash = spl_object_id($this);
-    }
-
     /**
      * Return the cell collection.
      */
@@ -3212,7 +3201,7 @@ private function validateNamedRange(string $definedName, bool $returnNullIfInval
 
         if ($namedRange->getLocalOnly()) {
             $worksheet = $namedRange->getWorksheet();
-            if ($worksheet === null || $this->hash !== $worksheet->getHashInt()) {
+            if ($worksheet === null || $this !== $worksheet) {
                 if ($returnNullIfInvalid) {
                     return null;
                 }
@@ -3344,21 +3333,22 @@ public function garbageCollect(): static
         }
 
         // Cache values
-        if ($highestColumn < 1) {
-            $this->cachedHighestColumn = 1;
-        } else {
-            $this->cachedHighestColumn = $highestColumn;
-        }
+        $this->cachedHighestColumn = max(1, $highestColumn);
         /** @var int $highestRow */
         $this->cachedHighestRow = $highestRow;
 
         // Return
         return $this;
     }
 
+    /**
+     * @deprecated 5.2.0 Serves no useful purpose. No replacement.
+     *
+     * @codeCoverageIgnore
+     */
     public function getHashInt(): int
     {
-        return $this->hash;
+        return spl_object_id($this);
     }
 
     /**
@@ -3745,7 +3735,6 @@ public function __clone()
                 }
             }
         }
-        $this->hash = spl_object_id($this);
     }
 
     /**

diff --git a/tests/PhpSpreadsheetTests/Reader/Xml/XmlTest.php b/tests/PhpSpreadsheetTests/Reader/Xml/XmlTest.php
@@ -57,7 +57,6 @@ public function testLoadCorruptedFile(): void
 
         $xmlReader = new Xml();
         $spreadsheet = @$xmlReader->load('tests/data/Reader/Xml/CorruptedXmlFile.xml');
-        self::assertNotSame('', $spreadsheet->getID());
     }
 
     public function testListWorksheetNamesCorruptedFile(): void

diff --git a/tests/PhpSpreadsheetTests/Shared/XMLWriterNoUri.php b/tests/PhpSpreadsheetTests/Shared/XMLWriterNoUri.php
@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Shared;
+
+class XMLWriterNoUri extends \PhpOffice\PhpSpreadsheet\Shared\XMLWriter
+{
+    public function openUri(string $uri): bool
+    {
+        return false;
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Shared/XmlWriterTest.php b/tests/PhpSpreadsheetTests/Shared/XmlWriterTest.php
@@ -83,4 +83,28 @@ public function testDiskCache(): void
         $expected .= '</root>' . $indentnl;
         self::assertSame($expected, $objWriter->getData());
     }
+
+    public function testFallbackToMemory(): void
+    {
+        XMLWriter::$debugEnabled = false;
+        $indent = '';
+        $indentnl = '';
+        $objWriter = new XMLWriterNoUri(XMLWriter::STORAGE_DISK);
+        $objWriter->startDocument('1.0', 'UTF-8', 'yes');
+        $expected = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>' . "\n";
+        $objWriter->startElement('root');
+        $expected .= '<root>' . $indentnl;
+        $objWriter->startElement('node');
+        $expected .= $indent . '<node>';
+        $objWriter->writeRawData('xyz');
+        $expected .= 'xyz';
+        $objWriter->writeRawData(null);
+        $objWriter->writeRawData(['12', '34', '5']);
+        $expected .= "12\n34\n5";
+        $objWriter->endElement(); // node
+        $expected .= '</node>' . $indentnl;
+        $objWriter->endElement(); // root
+        $expected .= '</root>' . $indentnl;
+        self::assertSame($expected, $objWriter->getData());
+    }
 }
diff --git a/tests/PhpSpreadsheetTests/Worksheet/CloneTest.php b/tests/PhpSpreadsheetTests/Worksheet/CloneTest.php
@@ -51,7 +51,7 @@ public function testSerialize1(): void
         $newSheet = unserialize($serialized);
         self::assertInstanceOf(Worksheet::class, $newSheet);
         self::assertSame(10, $newSheet->getCell('A1')->getValue());
-        self::assertNotEquals($newSheet->getHashInt(), $sheet1->getHashInt());
+        self::assertNotSame($newSheet, $sheet1);
         self::assertNotNull($newSheet->getParent());
         self::assertNotSame($newSheet->getParent(), $sheet1->getParent());
         $newSheet->getParent()->disconnectWorksheets();
@@ -66,6 +66,6 @@ public function testSerialize2(): void
         $newSheet = unserialize($serialized);
         self::assertInstanceOf(Worksheet::class, $newSheet);
         self::assertSame(10, $newSheet->getCell('A1')->getValue());
-        self::assertNotEquals($newSheet->getHashInt(), $sheet1->getHashInt());
+        self::assertNotSame($newSheet, $sheet1);
     }
 }