how to set conditional css in php - php

Question

this scripts reads and excel file and put them into a table and show them . the problem here is i want my data in cell to show green if they are above 0 and red if they are less than 0 this is my script and i dont know why it doesnt work !! every thing is fine untill line 53 !!wich i set if for val above 0 !! can any one help ?? thnkx in advance !!!
`
<?php
require 'Classes/PHPExcel.php';
require_once 'Classes/PHPExcel/IOFactory.php';
$conn = mysql_connect("localhost","datanew","datanew");
mysql_select_db("datanew",$conn);
$path = "1.xlsx";
$objPHPExcel = PHPExcel_IOFactory::load($path);
foreach ($objPHPExcel->getWorksheetIterator() as $worksheet) {
$worksheetTitle = $worksheet->getTitle();
$highestRow = $worksheet->getHighestRow(); // e.g. 10
$highestColumn = $worksheet->getHighestColumn(); // e.g 'F'
$highestColumnIndex = PHPExcel_Cell::columnIndexFromString($highestColumn);
$nrColumns = ord($highestColumn) - 64;
echo '<table><tr>';
for ($row = 1; $row <= $highestRow; ++ $row) {
echo '<tr>';
for ($col = 0; $col < $highestColumnIndex; ++ $col) {
$cell = $worksheet->getCellByColumnAndRow($col, $row);
$val = $cell->getValue();
$dataType = PHPExcel_Cell_DataType::dataTypeForValue($val);
echo '<td>' . $val . '<br></td>';
}
echo '</tr>';
}
echo '</table>';
}
for ($row = 2; $row <= $highestRow; ++ $row) {
$val=array();
for ($col = 0; $col < $highestColumnIndex; ++ $col) {
$cell = $worksheet->getCellByColumnAndRow($col, $row);
$val[] = $cell->getValue();
} }
?>
<?php
if($val > 0) {?>
<td style="color:#06e716;"></td>
<?php } else { ?>
<td style="color:#e70630;"></td>
<?php } ?>`

Answer 1

$val is an array, you need to use count function
try
if(count($val)>0){
}else{
}