利用PHPExcel读取excel文件

$filePath = "7788.xls";
$PHPExcel = new PHPExcel();
$PHPReader = new PHPExcel_Reader_Excel2007();
if(!$PHPReader->canRead($filePath)){
    $PHPReader = new PHPExcel_Reader_Excel5();
    if(!$PHPReader->canRead($filePath)){
        die('无法读取excel文件');
    }
}
$PHPExcel = $PHPReader->load($filePath);
$currentSheet = $PHPExcel->getSheet(0);
$allRow = $currentSheet->getHighestRow();
for($currentRow = 2; $currentRow <= $allRow; $currentRow++){
    $a_val = $currentSheet->getCell("A$currentRow")->getCalculatedValue();
    $b_val = $currentSheet->getCell("B$currentRow")->getCalculatedValue();
    $c_val = $currentSheet->getCell("C$currentRow")->getCalculatedValue();
    echo $a_val."\t".$b_val."\t".$c_val."\t";
    echo "\n";
}