thinkphp 使用过程中遇到的一个小函数

1.实现导出Excel文件,并在导出的文件中显示图片

//导出
public function push(){
    $goods_list=M('Dajia')->select();	
    $data = array();
    foreach ($goods_list as $k=>$goods_info){
        $data[$k][id] = $goods_info['id'];
        $data[$k][dingwei] = $goods_info['dingwei']; 
    $data[$k][mylocal] = $goods_info['mylocal']; 
    $data[$k][content] = $goods_info['content']; 
    $data[$k][name] = $goods_info['name'];  
    $data[$k][tel] = $goods_info['tel'];  
    }
    foreach ($data as $field=>$v){
        if($field == 'id'){
            $headArr[]='ID';
        }
        if($field == 'dingwei'){
            $headArr[]='提交位置';
        }
    if($field == 'mylocal'){
            $headArr[]='污染位置';
        }
    if($field == 'content'){
            $headArr[]='问题描述';
        }
    if($field == 'name'){
            $headArr[]='举报者姓名';
        }
    if($field == 'tel'){
            $headArr[]='联系电话';
        }	
    }
    $filename="jiandu";
    $this->getExcel($filename,$headArr,$data);
  }


   private  function getExcel($fileName,$headArr,$data){
    //导入PHPExcel类库，因为PHPExcel没有用命名空间，只能inport导入
    import("Org.PHPExcel");
    import("Org.PHPExcel.Writer.Excel5");
    import("Org.PHPExcel.IOFactory.php");

    $date = date("Y_m_d",time());
    $fileName .= "_{$date}.xls";

    //创建PHPExcel对象，注意，不能少了
    $objPHPExcel = new PHPExcel();
    $objProps = $objPHPExcel->getProperties();
	

    //设置表头
    $key = ord("A");
    //print_r($headArr);exit;
    foreach($headArr as $v){
        $colum = chr($key);
        $objPHPExcel->setActiveSheetIndex(0) ->setCellValue($colum.'1', $v);
        $objPHPExcel->setActiveSheetIndex(0) ->setCellValue($colum.'1', $v);
        $key += 1;
    }

    $column = 2;
    $objActSheet = $objPHPExcel->getActiveSheet();

    //print_r($data);exit;
    foreach($data as $key => $rows){ //行写入
        $span = ord("A");
		$i=0;
        foreach($rows as $keyName=>$value){// 列写入
			$i++;
            $j = chr($span);
			if($value&&($i==7||$i==8||$i==9||$i==10)){
				$objDrawing = new PHPExcel_Worksheet_Drawing();
				$objDrawing->setName('Photo');
				$objDrawing->setDescription('Photo');
				$objDrawing->setPath($value);
				$objDrawing->setHeight(170);
				$objDrawing->setWidth(120);
				$objDrawing->setCoordinates($j.$column);
				$objDrawing->setWorksheet($objPHPExcel->getActiveSheet());	
			}
			else{
				$objActSheet->setCellValue($j.$column, $value);
			}
			$span++;
        }
        $column++;
    }
	/*	$objDrawing = new PHPExcel_Worksheet_Drawing();
		$objDrawing->setName('Photo');
		$objDrawing->setDescription('Photo');
		$objDrawing->setPath('./uploads/1.jpg');
		$objDrawing->setHeight(170);
		$objDrawing->setWidth(120);
		$objDrawing->setCoordinates('G2');
		$objDrawing->setWorksheet($objPHPExcel->getActiveSheet());*/

    $fileName = iconv("utf-8", "gb2312", $fileName);
    //重命名表
    //$objPHPExcel->getActiveSheet()->setTitle('test');
    //设置活动单指数到第一个表,所以Excel打开这是第一个表
    $objPHPExcel->setActiveSheetIndex(0);
    header('Content-Type: application/vnd.ms-excel');
    header("Content-Disposition: attachment;filename="$fileName"");
    header('Cache-Control: max-age=0');

    $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');
    $objWriter->save('php://output'); //文件通过浏览器下载
    exit;
}

2.获得中文字符拼音首字母
error_reporting(E_ALL^E_NOTICE);
function getFirstCharter($str){
if(empty($str)){return '';}
$fchar=ord($str{0});
if($fchar>=ord('A')&&$fchar<=ord('z')) return strtoupper($str{0});
$s1=iconv('UTF-8','gb2312',$str);
$s2=iconv('gb2312','UTF-8',$s1);
$s=$s2==$str?$s1:$str;
$asc=ord($s{0})*256+ord($s{1})-65536;
if($asc>=-20319&&$asc<=-20284) return 'A';
if($asc>=-20283&&$asc<=-19776) return 'B';
if($asc>=-19775&&$asc<=-19219) return 'C';
if($asc>=-19218&&$asc<=-18711) return 'D';
if($asc>=-18710&&$asc<=-18527) return 'E';
if($asc>=-18526&&$asc<=-18240) return 'F';
if($asc>=-18239&&$asc<=-17923) return 'G';
if($asc>=-17922&&$asc<=-17418) return 'H';
if($asc>=-17417&&$asc<=-16475) return 'J';
if($asc>=-16474&&$asc<=-16213) return 'K';
if($asc>=-16212&&$asc<=-15641) return 'L';
if($asc>=-15640&&$asc<=-15166) return 'M';
if($asc>=-15165&&$asc<=-14923) return 'N';
if($asc>=-14922&&$asc<=-14915) return 'O';
if($asc>=-14914&&$asc<=-14631) return 'P';
if($asc>=-14630&&$asc<=-14150) return 'Q';
if($asc>=-14149&&$asc<=-14091) return 'R';
if($asc>=-14090&&$asc<=-13319) return 'S';
if($asc>=-13318&&$asc<=-12839) return 'T';
if($asc>=-12838&&$asc<=-12557) return 'W';
if($asc>=-12556&&$asc<=-11848) return 'X';
if($asc>=-11847&&$asc<=-11056) return 'Y';
if($asc>=-11055&&$asc<=-10247) return 'Z';
return null;
}
echo getFirstCharter('黎明');
?>