php - Cant read and manipulate excel data -


i'm trying read excel.xlsx file. can't, i'm reading api called phpexcel can't make work. tried: 

<?php     // access class     require_once 'classes/phpexcel.php';     include 'classes/iofactory.php';      $inputfilename = 'teste.xlsx';      //  read excel workbook     try{         $inputfiletype = phpexcel_iofactory::identify($inputfilename);         $objreader = phpexcel_iofactory::createreader($inputfiletype);         $objphpexcel = $objreader->load($inputfilename);     }      catch(exception $e) {         die('error loading file "'.pathinfo($inputfilename,pathinfo_basename).'": '.$e->getmessage());     }      //  worksheet dimensions     $sheet = $objphpexcel->getsheet(0);      $highestrow = $sheet->gethighestrow();      $highestcolumn = $sheet->gethighestcolumn();      //  loop through each row of worksheet in turn     ($row = 1; $row <= $highestrow; $row++){          //  read row of data array         $rowdata = $sheet->rangetoarray('a' . $row . ':' . $highestcolumn . $row,null, true, false);           echo $rowdata[$row];     }  ?>

at end of loop, tried read or echo data, got errors like: undefined offset.


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