讀取Excel文件成數組-PHP

<?php
require('PHPExcel/Classes/PHPExcel.php');//引入PHP EXCEL類
function format_excel2array($filePath='',$sheet=0){
    if(empty($filePath) or !file_exists($filePath)){die('file not exists');}
    $PHPReader = new PHPExcel_Reader_Excel2007();        //建立reader對象
    if(!$PHPReader->canRead($filePath)){
        $PHPReader = new PHPExcel_Reader_Excel5();
        if(!$PHPReader->canRead($filePath)){
            echo 'no Excel';
            return ;
        }
    }
    $PHPExcel = $PHPReader->load($filePath);        //建立excel對象
    $currentSheet = $PHPExcel->getSheet($sheet);        //**讀取excel文件中的指定工作表*/
    $allColumn = $currentSheet->getHighestColumn();        //**取得最大的列號*/
    $allRow = $currentSheet->getHighestRow();        //**取得一共有多少行*/
    $data = array();
    for($rowIndex=1;$rowIndex<=$allRow;$rowIndex++){        //循環讀取每個單元格的內容。注意行從1開始，列從A開始
        for($colIndex='A';$colIndex<=$allColumn;$colIndex++){
            $addr = $colIndex.$rowIndex;
            $cell = $currentSheet->getCell($addr)->getValue();
            if($cell instanceof PHPExcel_RichText){ //富文本轉換字符串
                $cell = $cell->__toString();
            }
            $data[$rowIndex][$colIndex] = $cell;
        }
    }
    return $data;
}