Warning : mysqli_num_rows() expects parameter 1 to be mysqli_result, bool given in
<?php
include("db.php");
$search = $_POST['search'];
echo $search;
$sql = "SELECT * FROM `products` WHERE CONCAT(`pro_title`, `pro_sub_title`, `pro_keyword`, `pro_price`, `pro_cutprice`, `pro_stock`, `pro_Feature1`, `pro_Feature2`, `pro_Feature3`, `pro_Feature4`, `pro_Feature5`, `Product_des`, `pro_img1`, `pro_img2`, `pro_img3`, `pro_img4`, `pro_num`, `whom`, `size`, `kids_size`, `color`, `size_m`, `material`, `brend`) LIKE '%".$search."%'";
$result = mysqli_query($con, $sql);
if(mysqli_num_rows($result)){
while($row = mysqli_fetch_assoc($result)){
?>