for($s = 0;$s<$sheetCount;$s++) {
$currentSheet = $_phpExcel->getSheet($s);
$allColumn = $currentSheet->getHighestColumn();
$allRow = $currentSheet->getHighestRow();
for($r = 1;$r<=$allRow;$r++){
for($currentColumn='A';$currentColumn<=$allColumn;$currentColumn++){
$address = $currentColumn.$r;
$newExcel[] = $currentSheet->getCell($address)->getValue();
}
}
}