PHP | Spreadsheet_Excel_Writer | setItalic() Function

<?php
// require_once 'Spreadsheet/Excel/Writer.php';

// Add Workbook
$workbook = new Spreadsheet_Excel_Writer();

// Add Format to spreadsheet
$format_italic =& $workbook->addFormat();

// Set Italic
$format_italic->setItalic();

// Add Worksheet to Spreadsheet
$worksheet =& $workbook->addWorksheet();

// Write to Worksheet
$worksheet->write(0, 0, "Details of GeeksforGeeks 
                      Contributors", $format_italic);
$worksheet->write(1, 0, "Author", $format_italic);
$worksheet->write(1, 1, "User Handle", $format_italic);
$worksheet->write(2, 0, "Sarthak", $format_italic);
$worksheet->write(2, 1, "sarthak_ishu11", $format_italic);

// Send .xlsx file to header
$workbook->send('test.xls');

// Close Workbook Object
$workbook->close();
?>

<?php

// require_once 'Spreadsheet/Excel/Writer.php';

// Create Spreadsheet_Excel_Writer Object
$workbook = new Spreadsheet_Excel_Writer();

// Add Worksheet
$worksheet =& $workbook->addWorksheet();

// Set Font Family Times New Roman 
$format_setItalic =& $workbook->addFormat();
$format_setItalic->setFontFamily('Times New Roman');

// Set Italic Property 
$format_setItalic->setItalic();

// Set Shadow to text
$format_setItalic->setShadow();

// Write to Worksheet
$worksheet->write(0, 0, "Information");
$worksheet->write(1, 0, "Website Name", $format_setItalic);
$worksheet->write(1, 1, "Address", $format_setItalic);
$worksheet->write(2, 0, "GeeksforGeeks", $format_setItalic);
$worksheet->write(2, 1, "https://www.geeksforgeeks.org/",
                                     $format_setItalic);
$workbook->send('test.xls');

$workbook->close();
?>