body { background-color: yellow; } EOF; return preg_replace('~~', "$newstyle", $html); } public function testSetAndReset(): void { $spreadsheet = new Spreadsheet(); $sheet = $spreadsheet->getActiveSheet(); $sheet->setCellValue('A1', '1'); $writer = new Html($spreadsheet); $html1 = $writer->generateHTMLall(); $writer->setEditHtmlCallback([$this, 'yellowBody']); $html2 = $writer->generateHTMLall(); $writer->setEditHtmlCallback(null); $html3 = $writer->generateHTMLall(); self::assertFalse(strpos($html1, 'background-color: yellow')); self::assertNotFalse(strpos($html2, 'background-color: yellow')); self::assertFalse(strpos($html3, 'background-color: yellow')); self::assertEquals($html3, $html1); $writer->setEditHtmlCallback([$this, 'yellowBody']); $oufil = tempnam(File::sysGetTempDir(), 'phpspreadsheet-test'); $writer->save($oufil); $html4 = file_get_contents($oufil); unlink($oufil); self::assertNotFalse(strpos($html4, 'background-color: yellow')); $this->writeAndReload($spreadsheet, 'Html'); } }