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vendor/phpoffice/phpspreadsheet/samples/Basic/03_Formulas.php

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+<?php
+
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+
+require __DIR__ . '/../Header.php';
+
+// Create new Spreadsheet object
+$helper->log('Create new Spreadsheet object');
+$spreadsheet = new Spreadsheet();
+
+// Set document properties
+$helper->log('Set document properties');
+$spreadsheet->getProperties()->setCreator('Maarten Balliauw')
+    ->setLastModifiedBy('Maarten Balliauw')
+    ->setTitle('Office 2007 XLSX Test Document')
+    ->setSubject('Office 2007 XLSX Test Document')
+    ->setDescription('Test document for Office 2007 XLSX, generated using PHP classes.')
+    ->setKeywords('office 2007 openxml php')
+    ->setCategory('Test result file');
+
+// Add some data, we will use some formulas here
+$helper->log('Add some data');
+$spreadsheet->getActiveSheet()
+    ->setCellValue('A5', 'Sum:');
+
+$spreadsheet->getActiveSheet()->setCellValue('B1', 'Range #1')
+    ->setCellValue('B2', 3)
+    ->setCellValue('B3', 7)
+    ->setCellValue('B4', 13)
+    ->setCellValue('B5', '=SUM(B2:B4)');
+$helper->log('Sum of Range #1 is ' . $spreadsheet->getActiveSheet()->getCell('B5')->getCalculatedValue());
+
+$spreadsheet->getActiveSheet()->setCellValue('C1', 'Range #2')
+    ->setCellValue('C2', 5)
+    ->setCellValue('C3', 11)
+    ->setCellValue('C4', 17)
+    ->setCellValue('C5', '=SUM(C2:C4)');
+$helper->log('Sum of Range #2 is ' . $spreadsheet->getActiveSheet()->getCell('C5')->getCalculatedValue());
+
+$spreadsheet->getActiveSheet()
+    ->setCellValue('A7', 'Total of both ranges:');
+$spreadsheet->getActiveSheet()
+    ->setCellValue('B7', '=SUM(B5:C5)');
+$helper->log('Sum of both Ranges is ' . $spreadsheet->getActiveSheet()->getCell('B7')->getCalculatedValue());
+
+$spreadsheet->getActiveSheet()
+    ->setCellValue('A8', 'Minimum of both ranges:');
+$spreadsheet->getActiveSheet()
+    ->setCellValue('B8', '=MIN(B2:C4)');
+$helper->log('Minimum value in either Range is ' . $spreadsheet->getActiveSheet()->getCell('B8')->getCalculatedValue());
+
+$spreadsheet->getActiveSheet()
+    ->setCellValue('A9', 'Maximum of both ranges:');
+$spreadsheet->getActiveSheet()
+    ->setCellValue('B9', '=MAX(B2:C4)');
+$helper->log('Maximum value in either Range is ' . $spreadsheet->getActiveSheet()->getCell('B9')->getCalculatedValue());
+
+$spreadsheet->getActiveSheet()
+    ->setCellValue('A10', 'Average of both ranges:');
+$spreadsheet->getActiveSheet()
+    ->setCellValue('B10', '=AVERAGE(B2:C4)');
+$helper->log('Average value of both Ranges is ' . $spreadsheet->getActiveSheet()->getCell('B10')->getCalculatedValue());
+$spreadsheet->getActiveSheet()
+    ->getColumnDimension('A')
+    ->setAutoSize(true);
+
+// Rename worksheet
+$helper->log('Rename worksheet');
+$spreadsheet->getActiveSheet()
+    ->setTitle('Formulas');
+
+//
+//  If we set Pre Calculated Formulas to true then PhpSpreadsheet will calculate all formulae in the
+//    workbook before saving. This adds time and memory overhead, and can cause some problems with formulae
+//    using functions or features (such as array formulae) that aren't yet supported by the calculation engine
+//  If the value is false (the default) for the Xlsx Writer, then MS Excel (or the application used to
+//    open the file) will need to recalculate values itself to guarantee that the correct results are available.
+//
+//$writer->setPreCalculateFormulas(true);
+// Save
+$helper->write($spreadsheet, __FILE__);