使用PHPExcel库

Question

当我尝试使用PHPExcel库从上传文件夹中读取上传的excel文件时，可能会导致错误，我无法找到原因。根据Nginx日志，有＃34;连接由同行重置＆＃34;错误如下：

[error] 111#111: *124 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 172.17.0.1,

直到行$objPHPExcel = $objReader->load( $file_name );一切正常但在这一行上，文件无法执行，除此之外，catch块中没有任何异常。

由于此问题，Nginx在浏览器中出现502 Bad Gateway错误。

public function load_excel( $file_name )
    {
        try {
             /**  Identify the type of $inputFileName  **/
            $inputFileType = \PHPExcel_IOFactory::identify( $file_name );
            /**  Create a new Reader of the type that has been identified  **/
            $objReader = \PHPExcel_IOFactory::createReader( $inputFileType );
            /**  Advise the Reader that we only want to load cell data  **/
            $objReader->setReadDataOnly( true );
            /**  Load $inputFileName to a PHPExcel Object  **/
            $objPHPExcel = $objReader->load( $file_name );
        } catch(\PHPExcel_Reader_Exception $e) {
            error_log($e->getMessage());
            return false;
        }
        return $objPHPExcel;
    }