<?php
require_once './Classes/PHPExcel.php';
require_once './Classes/PHPExcel/IOFactory.php';

$objPHPExcel = new PHPExcel();

$phpColor = new PHPExcel_Style_Color();
$phpColor->setRGB("0070C0");

$objRichText = new PHPExcel_RichText();
$run1 = $objRichText->createTextRun('Main Part of the Title, ');
$run1->getFont()->applyFromArray(array( "bold" => true, "size" => 14, "name" => "Calibri", "color" => array("rgb" => "0070C0")));

$run2 = $objRichText->createTextRun(' and some extra');
$run2->getFont()->applyFromArray(array( "bold" => true, "size" => 10, "name" => "Calibri", "color" => array("rgb" => "0070C0")));

$objPHPExcel->getActiveSheet()->setCellValue("A1", $objRichText);
header ( 'Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' );
header ( 'Content-Disposition: attachment;filename="sq_test.xlsx"' );
header ( 'Cache-Control: max-age=0' );
$objWriter = PHPExcel_IOFactory::createWriter ( $objPHPExcel, 'Excel2007' );
$objWriter->save ( 'php://output' );
?>