PHPExcel unable to read file

I'm using CakePHP 3.2 and PHPExcel library to import data from excel sheet to database.

I have the library at

/vendor/PHPExcel/Classes/PHPExcel.php
/vendor/PHPExcel/Classes/PHPExcel/IOFactory.php

and the action in controller is

public function bulkUpload()
{
   $inputFileName = $this->request->data('excel_data');
   //debug($inputFileName['name']);
   if ($inputFileName != '') {
     $inputFileType = \PHPExcel_IOFactory::identify($inputFileName);
     $objReader = \PHPExcel_IOFactory::createReader($inputFileType);

     $objReader->setReadDataOnly(true);
     $objPHPExcel = $objReader->load($inputFileName);
     $objWorksheet = $objPHPExcel->setActiveSheetIndex(0);
     $highestRow = $objWorksheet->getHighestRow();

     for ($row = 2; $row <= $highestRow; ++$row) {
        $this->data['Program']['cycle_month'] = $objWorksheet->getCellByColumnAndRow(1, $row)->getValue();
        $this->data['Program']['cycle_year'] = $objWorksheet->getCellByColumnAndRow(2, $row)->getValue();
        $this->data['Program']['media_partnum'] = $objWorksheet->getCellByColumnAndRow(3, $row)->getValue();

        $resultArray[$row-2] = $this->data['Program'];
     }

      debug($resultArray);
  }
}

But this gives error as

pathinfo() expects parameter 1 to be string, 
array given [ROOT/vendor/PHPExcel/Classes/PHPExcel/IOFactory.php, line 225]

and

file_exists() expects parameter 1 to be a valid path, 
array given [ROOT/vendor/PHPExcel/Classes/PHPExcel/Reader/Excel2007.php, line 72]

and on debug($inputFileName); it gives

[
    'name' => 'testing.xlsx',
    'type' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
    'tmp_name' => '/tmp/phpvDWDxG',
    'error' => (int) 0,
    'size' => (int) 5247
]

replacing $inputFileName; with $inputFileName['name'] in

$inputFileType = \PHPExcel_IOFactory::identify($inputFileName);

removes above two error but gives error as

 Could not open testing.xlsx for reading! File does not exist. 

Here, testing.xlsx is the file I'm selecting from form

You need to add file like below:

require_once(ROOT. DS .'vendor'.DS.'PHPExcel/Classes/PHPExcel.php');
require_once(ROOT . DS . 'vendor' . DS.'PHPExcel/Classes/PHPExcel/IOFactory.php');

y0ou also need to add a namespace like below

use PHPExcel;
use IOFactory;

Now you can access excel class library and easily read and write

i am using this in my project.

you can try.

Thanks :)