Worksheet::hideGridlines

require_once 'Spreadsheet/Excel/Writer.php';  $workbook = new Spreadsheet_Excel_Writer(); $worksheet =& $workbook->addWorksheet();  $radius = 20; $worksheet->setColumn(0,$radius*2,1);  // Face for ($i = 0; $i < 360; $i++) {     $worksheet->write(floor(sin((2*pi()*$i)/360)*$radius) + $radius + 1, floor(cos((2*pi()*$i)/360)*$radius) + $radius + 1, "x"); } // Eyes (maybe use a format instead?) $worksheet->writeURL(floor($radius*0.8), floor($radius*0.8), "0"); $worksheet->writeURL(floor($radius*0.8), floor($radius*1.2), "0");  // Smile for ($i = 65; $i < 115; $i++) {     $worksheet->write(floor(sin((2*pi()*$i)/360)*$radius*1.3) + floor($radius*0.2), floor(cos((2*pi()*$i)/360)*$radius*1.3) + $radius + 1, "x"); }  // hide gridlines so they don't mess with our Excel art. $worksheet->hideGridLines();  $workbook->send('face.xls'); $workbook->close();