Convert XLSX or XLS file to Array in PHP

Convert XLSX or XLS file to Array in PHP

<?php

function convertXLStoArray($infile, $outfile){
 
    if(!file_exists($infile) || !is_readable($infile) || !file_exists($outfile) || !is_readable($outfile))
    return FALSE;
 
    $fileType = PHPExcel_IOFactory::identify($infile);
    $objReader = PHPExcel_IOFactory::createReader($fileType);
 
    $objReader->setReadDataOnly(true);   
    $objPHPExcel = $objReader->load($infile);
    echo $objPHPExcel->getSheetCount(),' worksheet',(($objPHPExcel->getSheetCount() == 1) ? '' : 's'),' loaded<br /><br />';
    
 	foreach ($objPHPExcel->getWorksheetIterator() as $worksheet) {
		$arrayData[$worksheet->getTitle()] = $worksheet->toArray();
	}
	
	var_dump($arrayData);
}

please given my a example for use function

understand $infile, $outfile