diff --git a/dataformat/excel/tests/writer_test.php b/dataformat/excel/tests/writer_test.php
new file mode 100644
index 00000000000..ec9fce708ba
--- /dev/null
+++ b/dataformat/excel/tests/writer_test.php
@@ -0,0 +1,81 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace dataformat_excel;
+
+use core\dataformat;
+
+/**
+ * Tests for the dataformat_excel writer
+ *
+ * @package    dataformat_excel
+ * @copyright  2022 Marina Glancy
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class writer_test extends \advanced_testcase {
+
+    /**
+     * Test writing data whose content contains an image with pluginfile.php source
+     */
+    public function test_write_data(): void {
+        $columns = ['fruit', 'colour', 'animal'];
+        $rows = [
+            ['banana', 'yellow', 'monkey'],
+            ['apple', 'red', 'wolf'],
+            ['melon', 'green', 'aardvark'],
+        ];
+
+        // Export to file.
+        $exportfile = dataformat::write_data('My export', 'excel', $columns, $rows);
+
+        // Read the file.
+        $excelcells = $this->get_excel(file_get_contents($exportfile));
+
+        $this->assertEquals(array_merge([$columns], $rows), $excelcells);
+    }
+
+    /**
+     * Get an Excel object to check the content
+     *
+     * @param string $content
+     * @return array two-dimensional array with cell values
+     */
+    private function get_excel(string $content) {
+        $file = tempnam(sys_get_temp_dir(), 'excel_');
+        $handle = fopen($file, "w");
+        fwrite($handle, $content);
+        /** @var \Box\Spout\Reader\XLSX\Reader $reader */
+        $reader = \Box\Spout\Reader\Common\Creator\ReaderFactory::createFromType(\Box\Spout\Common\Type::XLSX);
+        $reader->open($file);
+
+        /** @var \Box\Spout\Reader\XLSX\Sheet[] $sheets */
+        $sheets = $reader->getSheetIterator();
+        $rowscellsvalues = [];
+        foreach ($sheets as $sheet) {
+            /** @var \Box\Spout\Common\Entity\Row[] $rows */
+            $rows = $sheet->getRowIterator();
+            foreach ($rows as $row) {
+                $thisvalues = [];
+                foreach ($row->getCells() as $cell) {
+                    $thisvalues[] = $cell->getValue();
+                }
+                $rowscellsvalues[] = $thisvalues;
+            }
+        }
+
+        return $rowscellsvalues;
+    }
+}
diff --git a/dataformat/ods/tests/writer_test.php b/dataformat/ods/tests/writer_test.php
new file mode 100644
index 00000000000..fe71ab0f50b
--- /dev/null
+++ b/dataformat/ods/tests/writer_test.php
@@ -0,0 +1,80 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace dataformat_ods;
+
+use core\dataformat;
+
+/**
+ * Tests for the dataformat_ods writer
+ *
+ * @package    dataformat_ods
+ * @copyright  2022 Marina Glancy
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class writer_test extends \advanced_testcase {
+
+    /**
+     * Test writing data whose content contains an image with pluginfile.php source
+     */
+    public function test_write_data(): void {
+        $columns = ['fruit', 'colour', 'animal'];
+        $rows = [
+            ['banana', 'yellow', 'monkey'],
+            ['apple', 'red', 'wolf'],
+            ['melon', 'green', 'aardvark'],
+        ];
+
+        // Export to file.
+        $exportfile = dataformat::write_data('My export', 'ods', $columns, $rows);
+
+        // Read the file.
+        $odscells = $this->get_ods_rows_content(file_get_contents($exportfile));
+
+        $this->assertEquals(array_merge([$columns], $rows), $odscells);
+    }
+
+    /**
+     * Get ods rows from binary content
+     * @param string $content
+     * @return array
+     * @throws \Box\Spout\Common\Exception\IOException
+     * @throws \Box\Spout\Reader\Exception\ReaderNotOpenedException
+     */
+    private function get_ods_rows_content($content) {
+        $reader = \Box\Spout\Reader\Common\Creator\ReaderFactory::createFromType(\Box\Spout\Common\Type::ODS);
+        $file = tempnam(sys_get_temp_dir(), 'ods_');
+        $handle = fopen($file, "w");
+        fwrite($handle, $content);
+        $reader->open($file);
+        /** @var \Box\Spout\Reader\ODS\Sheet[] $sheets */
+        $sheets = $reader->getSheetIterator();
+        $rowscellsvalues = [];
+        foreach ($sheets as $sheet) {
+            /** @var \Box\Spout\Common\Entity\Row[] $rows */
+            $rows = $sheet->getRowIterator();
+            foreach ($rows as $row) {
+                $thisvalues = [];
+                foreach ($row->getCells() as $cell) {
+                    $thisvalues[] = $cell->getValue();
+                }
+                $rowscellsvalues[] = $thisvalues;
+            }
+        }
+
+        return $rowscellsvalues;
+    }
+}
diff --git a/lib/spout/readme_moodle.txt b/lib/spout/readme_moodle.txt
index 2fab36e584b..b2812a56a4e 100644
--- a/lib/spout/readme_moodle.txt
+++ b/lib/spout/readme_moodle.txt
@@ -12,6 +12,7 @@ MDL-73624 needs to fix with a couple of minor changes to
 Writer/WriterAbstract.php. The changes replace rawurldecode() with
 rawurlencode() in lines 143 and 144.
 by Meirza <meirza.arson@moodle.com>
+MDL-76494 compatibility for PHP 8.1
 
 2021/09/01
 ----------
diff --git a/lib/spout/src/Spout/Common/Helper/GlobalFunctionsHelper.php b/lib/spout/src/Spout/Common/Helper/GlobalFunctionsHelper.php
index 5deb8d93f26..08d475dbe90 100644
--- a/lib/spout/src/Spout/Common/Helper/GlobalFunctionsHelper.php
+++ b/lib/spout/src/Spout/Common/Helper/GlobalFunctionsHelper.php
@@ -243,10 +243,10 @@ class GlobalFunctionsHelper
      * @see basename()
      *
      * @param string $path
-     * @param string|null $suffix
+     * @param string $suffix
      * @return string
      */
-    public function basename($path, $suffix = null)
+    public function basename($path, $suffix = '')
     {
         return \basename($path, $suffix);
     }
diff --git a/lib/spout/src/Spout/Reader/CSV/RowIterator.php b/lib/spout/src/Spout/Reader/CSV/RowIterator.php
index 78e66501320..c3f5592858b 100644
--- a/lib/spout/src/Spout/Reader/CSV/RowIterator.php
+++ b/lib/spout/src/Spout/Reader/CSV/RowIterator.php
@@ -84,6 +84,7 @@ class RowIterator implements IteratorInterface
      *
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function rewind()
     {
         $this->rewindAndSkipBom();
@@ -114,6 +115,7 @@ class RowIterator implements IteratorInterface
      *
      * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function valid()
     {
         return ($this->filePointer && !$this->hasReachedEndOfFile);
@@ -126,6 +128,7 @@ class RowIterator implements IteratorInterface
      * @throws \Box\Spout\Common\Exception\EncodingConversionException If unable to convert data to UTF-8
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function next()
     {
         $this->hasReachedEndOfFile = $this->globalFunctionsHelper->feof($this->filePointer);
@@ -224,6 +227,7 @@ class RowIterator implements IteratorInterface
      *
      * @return Row|null
      */
+    #[\ReturnTypeWillChange]
     public function current()
     {
         return $this->rowBuffer;
@@ -235,6 +239,7 @@ class RowIterator implements IteratorInterface
      *
      * @return int
      */
+    #[\ReturnTypeWillChange]
     public function key()
     {
         return $this->numReadRows;
diff --git a/lib/spout/src/Spout/Reader/CSV/SheetIterator.php b/lib/spout/src/Spout/Reader/CSV/SheetIterator.php
index 69eb58a0ba9..27669c77c2e 100644
--- a/lib/spout/src/Spout/Reader/CSV/SheetIterator.php
+++ b/lib/spout/src/Spout/Reader/CSV/SheetIterator.php
@@ -30,6 +30,7 @@ class SheetIterator implements IteratorInterface
      *
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function rewind()
     {
         $this->hasReadUniqueSheet = false;
@@ -41,6 +42,7 @@ class SheetIterator implements IteratorInterface
      *
      * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function valid()
     {
         return (!$this->hasReadUniqueSheet);
@@ -52,6 +54,7 @@ class SheetIterator implements IteratorInterface
      *
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function next()
     {
         $this->hasReadUniqueSheet = true;
@@ -63,6 +66,7 @@ class SheetIterator implements IteratorInterface
      *
      * @return \Box\Spout\Reader\CSV\Sheet
      */
+    #[\ReturnTypeWillChange]
     public function current()
     {
         return $this->sheet;
@@ -74,6 +78,7 @@ class SheetIterator implements IteratorInterface
      *
      * @return int
      */
+    #[\ReturnTypeWillChange]
     public function key()
     {
         return 1;
diff --git a/lib/spout/src/Spout/Reader/ODS/RowIterator.php b/lib/spout/src/Spout/Reader/ODS/RowIterator.php
index 81f0953d811..27a06001a65 100644
--- a/lib/spout/src/Spout/Reader/ODS/RowIterator.php
+++ b/lib/spout/src/Spout/Reader/ODS/RowIterator.php
@@ -118,6 +118,7 @@ class RowIterator implements IteratorInterface
      * @throws \Box\Spout\Reader\Exception\IteratorNotRewindableException If the iterator is rewound more than once
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function rewind()
     {
         // Because sheet and row data is located in the file, we can't rewind both the
@@ -142,6 +143,7 @@ class RowIterator implements IteratorInterface
      *
      * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function valid()
     {
         return (!$this->hasReachedEndOfFile);
@@ -155,6 +157,7 @@ class RowIterator implements IteratorInterface
      * @throws \Box\Spout\Common\Exception\IOException If unable to read the sheet data XML
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function next()
     {
         if ($this->doesNeedDataForNextRowToBeProcessed()) {
@@ -356,6 +359,7 @@ class RowIterator implements IteratorInterface
      *
      * @return Row
      */
+    #[\ReturnTypeWillChange]
     public function current()
     {
         return $this->rowBuffer;
@@ -367,6 +371,7 @@ class RowIterator implements IteratorInterface
      *
      * @return int
      */
+    #[\ReturnTypeWillChange]
     public function key()
     {
         return $this->lastRowIndexProcessed;
@@ -377,6 +382,7 @@ class RowIterator implements IteratorInterface
      *
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function end()
     {
         $this->xmlReader->close();
diff --git a/lib/spout/src/Spout/Reader/ODS/SheetIterator.php b/lib/spout/src/Spout/Reader/ODS/SheetIterator.php
index c7b8cd9dcf8..7dd420bc6c2 100644
--- a/lib/spout/src/Spout/Reader/ODS/SheetIterator.php
+++ b/lib/spout/src/Spout/Reader/ODS/SheetIterator.php
@@ -79,6 +79,7 @@ class SheetIterator implements IteratorInterface
      * @throws \Box\Spout\Common\Exception\IOException If unable to open the XML file containing sheets' data
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function rewind()
     {
         $this->xmlReader->close();
@@ -131,6 +132,7 @@ class SheetIterator implements IteratorInterface
      *
      * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function valid()
     {
         return $this->hasFoundSheet;
@@ -142,6 +144,7 @@ class SheetIterator implements IteratorInterface
      *
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function next()
     {
         $this->hasFoundSheet = $this->xmlReader->readUntilNodeFound(self::XML_NODE_TABLE);
@@ -157,6 +160,7 @@ class SheetIterator implements IteratorInterface
      *
      * @return \Box\Spout\Reader\ODS\Sheet
      */
+    #[\ReturnTypeWillChange]
     public function current()
     {
         $escapedSheetName = $this->xmlReader->getAttribute(self::XML_ATTRIBUTE_TABLE_NAME);
@@ -214,6 +218,7 @@ class SheetIterator implements IteratorInterface
      *
      * @return int
      */
+    #[\ReturnTypeWillChange]
     public function key()
     {
         return $this->currentSheetIndex + 1;
@@ -224,6 +229,7 @@ class SheetIterator implements IteratorInterface
      *
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function end()
     {
         $this->xmlReader->close();
diff --git a/lib/spout/src/Spout/Reader/Wrapper/XMLReader.php b/lib/spout/src/Spout/Reader/Wrapper/XMLReader.php
index 6f85f320c8f..a05b72d85ed 100644
--- a/lib/spout/src/Spout/Reader/Wrapper/XMLReader.php
+++ b/lib/spout/src/Spout/Reader/Wrapper/XMLReader.php
@@ -83,6 +83,7 @@ class XMLReader extends \XMLReader
      * @throws \Box\Spout\Reader\Exception\XMLProcessingException If an error/warning occurred
      * @return bool TRUE on success or FALSE on failure
      */
+    #[\ReturnTypeWillChange]
     public function read()
     {
         $this->useXMLInternalErrors();
@@ -119,6 +120,7 @@ class XMLReader extends \XMLReader
      * @throws \Box\Spout\Reader\Exception\XMLProcessingException If an error/warning occurred
      * @return bool TRUE on success or FALSE on failure
      */
+    #[\ReturnTypeWillChange]
     public function next($localName = null)
     {
         $this->useXMLInternalErrors();
diff --git a/lib/spout/src/Spout/Reader/XLSX/RowIterator.php b/lib/spout/src/Spout/Reader/XLSX/RowIterator.php
index a54b8b192b0..9c891a0415d 100644
--- a/lib/spout/src/Spout/Reader/XLSX/RowIterator.php
+++ b/lib/spout/src/Spout/Reader/XLSX/RowIterator.php
@@ -139,6 +139,7 @@ class RowIterator implements IteratorInterface
      * @throws \Box\Spout\Common\Exception\IOException If the sheet data XML cannot be read
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function rewind()
     {
         $this->xmlReader->close();
@@ -163,6 +164,7 @@ class RowIterator implements IteratorInterface
      *
      * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function valid()
     {
         return (!$this->hasReachedEndOfFile);
@@ -176,6 +178,7 @@ class RowIterator implements IteratorInterface
      * @throws \Box\Spout\Common\Exception\IOException If unable to read the sheet data XML
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function next()
     {
         $this->nextRowIndexToBeProcessed++;
@@ -374,6 +377,7 @@ class RowIterator implements IteratorInterface
      *
      * @return Row|null
      */
+    #[\ReturnTypeWillChange]
     public function current()
     {
         $rowToBeProcessed = $this->rowBuffer;
@@ -399,6 +403,7 @@ class RowIterator implements IteratorInterface
      *
      * @return int
      */
+    #[\ReturnTypeWillChange]
     public function key()
     {
         // TODO: This should return $this->nextRowIndexToBeProcessed
@@ -414,6 +419,7 @@ class RowIterator implements IteratorInterface
      *
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function end()
     {
         $this->xmlReader->close();
diff --git a/lib/spout/src/Spout/Reader/XLSX/SheetIterator.php b/lib/spout/src/Spout/Reader/XLSX/SheetIterator.php
index 81f481c3cdc..aae8897eef4 100644
--- a/lib/spout/src/Spout/Reader/XLSX/SheetIterator.php
+++ b/lib/spout/src/Spout/Reader/XLSX/SheetIterator.php
@@ -38,6 +38,7 @@ class SheetIterator implements IteratorInterface
      *
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function rewind()
     {
         $this->currentSheetIndex = 0;
@@ -49,6 +50,7 @@ class SheetIterator implements IteratorInterface
      *
      * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function valid()
     {
         return ($this->currentSheetIndex < \count($this->sheets));
@@ -60,6 +62,7 @@ class SheetIterator implements IteratorInterface
      *
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function next()
     {
         // Using isset here because it is way faster than array_key_exists...
@@ -77,6 +80,7 @@ class SheetIterator implements IteratorInterface
      *
      * @return \Box\Spout\Reader\XLSX\Sheet
      */
+    #[\ReturnTypeWillChange]
     public function current()
     {
         return $this->sheets[$this->currentSheetIndex];
@@ -88,6 +92,7 @@ class SheetIterator implements IteratorInterface
      *
      * @return int
      */
+    #[\ReturnTypeWillChange]
     public function key()
     {
         return $this->currentSheetIndex + 1;
@@ -98,6 +103,7 @@ class SheetIterator implements IteratorInterface
      *
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function end()
     {
         // make sure we are not leaking memory in case the iteration stopped before the end
diff --git a/reportbuilder/tests/behat/customreports.feature b/reportbuilder/tests/behat/customreports.feature
index 0be0833214f..d25196b7315 100644
--- a/reportbuilder/tests/behat/customreports.feature
+++ b/reportbuilder/tests/behat/customreports.feature
@@ -252,3 +252,24 @@ Feature: Manage custom reports
     And I click on "Close 'Report users' editor" "button"
     And I press "View" action in the "Report users" report row
     And I should see "admin" in the "reportbuilder-table" "table"
+
+  Scenario Outline: Download custom report in different formats
+    Given the following "users" exist:
+      | username  | firstname | lastname |
+      | user1     | User      | 1        |
+      | user2     | User      | 2        |
+    And the following "core_reportbuilder > Reports" exist:
+      | name           | source                                       |
+      | Report users   | core_user\reportbuilder\datasource\users     |
+    When I am on the "Report users" "reportbuilder > Editor" page logged in as "admin"
+    And I click on "Switch to preview mode" "button"
+    Then I set the field "Download table data as" to "<format>"
+    And I press "Download"
+    Examples:
+      | format                             |
+      | Comma separated values (.csv)      |
+      | Microsoft Excel (.xlsx)            |
+      | HTML table                         |
+      | Javascript Object Notation (.json) |
+      | OpenDocument (.ods)                |
+      | Portable Document Format (.pdf)    |