PHPExcel 设置样式,背景颜色,居中,宽,单元格合并

        //设置第一行背景色为FFFF00
        $objPHPExcel
            ->getActiveSheet()
            ->getStyle('A1')
            ->getFill()
            ->setFillType(\PHPExcel_Style_Fill::FILL_SOLID)
            ->getStartColor()
            ->setRGB('FFFF00');

        //合并单元格
        $objPHPExcel->getActiveSheet()->mergeCells('A1:F1');

        //设置居中
        $objPHPExcel
            ->getActiveSheet()
            ->getStyle('A1:F1')
            ->getAlignment()
            ->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
        
         //字体
        $objPHPExcel
            ->getActiveSheet()
            ->getStyle('E2')
            ->getFont()
            ->setName('宋体')
            ->setBold(true); //字体加粗

        //设置宽度
        $objPHPExcel->getActiveSheet()->getColumnDimension('A')->setWidth(20);

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