filled data not inserting in mysql database - php

Question

I am new in php. when form is submitted the data is not storing in database not getting what is wrong in code. Below is my code
<form method="post" action="insert_product.php" enctype="multipart/form-data">
<table width="700" align="center" >
<tr>
<td><h1>Insert New Product</h1></td>
</tr>
<tr>
<td><b>Product Title</b></td>
<td><input type="text" name="product_title"></td>
</tr>
<tr>
<td><b>Product Category</b></td>
<td>
<select name="product_cat">
<option>Select Category</option>
<?php
$get_cats = "select * from categories";
$run_cats = mysqli_query($con , $get_cats);
while ( $row_cats = mysqli_fetch_array($run_cats)) {
$cat_id = $row_cats['cat_id'];
$cat_title = $row_cats['cat_title'];
echo "<option value='$cat_id'>$cat_title</option>";
}
?>
</select>
</td>
</tr>
<tr>
<td><b>Product Brand</b></td>
<td>
<select name="product_brand">
<option>Select Brand</option>
<?php
$get_brands = "select * from brands";
$run_brands = mysqli_query($con , $get_brands);
while ($row_brands = mysqli_fetch_array($run_brands)) {
$brand_id = $row_brands['brand_id'];
$brand_title = $row_brands['brand_title'];
echo "<option value='$brand_id'>$brand_title</option>";
}
?>
</select>
</td>
</tr>
<tr> <td><b>Product Image1</b></td>
<td><input type="file" name="product_img1"></td>
</tr>
<tr><td><b>Product Image2</b></td>
<td><input type="file" name="product_img2"></td>
</tr>
<tr><td><b>Product Image3</b></td>
<td><input type="file" name="product_img3"></td>
</tr>
<tr>
<td><b>Product Price</b></td>
<td><input type="text" name="product_price"></td>
</tr>
<tr>
<td><b>Product Info</b></td>
<td> <textarea name="product_desc">Easy! You should check out MoxieManager!</textarea></td>
</tr>
<tr>
<td><b>Product Keyword</b></td>
<td><input type="text" name="product_keyword"></td>
</tr>
<tr>
<td><input type="submit" name="insert_product" value="Insert"></td>
</tr>
</table>
</form>
and php code of it
<?php
if (isset($_POST['insert_product'])) {
$product_title = $_POST['product_title'];
$product_cat = $_POST['product_cat'];
$product_brand = $_POST['product_brand'];
$product_price = $_POST['product_price'];
$product_desc = $_POST['product_desc'];
$status = 'on';
$product_keyword = $_POST['product_keyword'];
//image names//
$product_img1 = $_FILES['product_img1']['name'];
$product_img2 = $_FILES['product_img2']['name'];
$product_img3 = $_FILES['product_img3']['name'];
//temp image names
$temp_name1 = $_FILES['product_img1']['tmp_name'];
$temp_name2 = $_FILES['product_img2']['tmp_name'];
$temp_name3 = $_FILES['product_img3']['tmp_name'];
if ($product_title=='' OR $product_cat=='' OR $product_brand=='' OR $product_price=='' OR $product_desc=='' OR $product_keyword=='' OR $product_img1=='' ) {
echo "<script>alert('Please Fill Everything')</script>";
exit();
}
else {
//uploading images to its folder
move_uploaded_file($temp_name1, "product_images/$product_img1");
move_uploaded_file($temp_name2, "product_images/$product_img2");
move_uploaded_file($temp_name3, "product_images/$product_img3");
$insert_product = "insert into products (cat_id,brand_id,date,product_title,product_img1,product_img2,product_img3,product_price,product_desc,status)
values ('$product_cat','$product_brand',NOW(),'$product_title','$product_img1','$product_img2','$product_img3','$product_price','$product_desc','$status')";
$run_product = mysqli_query($con, $insert_product);
if ($run_product) {
echo "<script>alert('Product Inserted')</script>";
}
}
}
?>
Till alert(fill everything) is working means when i click submit without filling form the alert is coming but after that when i filled everything and submit it. But alert is not coming and also data is not saving in database. Please help me. adding my database structure also. Thanks