phpExcel读取excel文件数据

require_once $_SERVER['DOCUMENT_ROOT'].'/Classes/PHPExcel.php';
require_once $_SERVER['DOCUMENT_ROOT'].'/Classes/PHPExcel/IOFactory.php';

$uploadfile = '/upload/excel.xls';
$time = time();
function getReadExcel($uploadfile,$time){
    $extension = substr($uploadfile,strrpos($uploadfile,'.')+1);
    switch ($extension){
        case 'xlsx':{
            $objReader = PHPExcel_IOFactory::createReader('Excel2007');/*excel2007 for 2007*/
        }break;
        case 'xls':{
            $objReader = PHPExcel_IOFactory::createReader('Excel5');/*Excel5 for 2003*/
        }break;
        case 'csv':{
            $objReader = PHPExcel_IOFactory::createReader('CSV');/*Csv for csv*/
        }break;
    }
    $objPHPExcel = $objReader->load($uploadfile); //Excel 路径
    $sheet = $objPHPExcel->getSheet(0);
    $objWorksheet = $objPHPExcel->getActiveSheet();
    $highestRow = $sheet->getHighestRow(); // 取得总行数
    $highestColumn = $sheet->getHighestColumn(); // 取得总列数
    $highestColumnIndex = PHPExcel_Cell::columnIndexFromString($highestColumn);//总列数

    for ($row = 1;$row <= $highestRow;$row++){
        $strs=array();
        //注意highestColumnIndex的列数索引从0开始
        for ($col = 0;$col < $highestColumnIndex;$col++){
            $strs[$col] = $objWorksheet->getCellByColumnAndRow($col, $row)->getValue();
            if($extension == 'csv'){
                $strs[$col] = iconv('gbk', 'utf-8', $strs[$col]);
            }
        }
        $data[] = $strs;
    }
    return $data;
}