How to write product filter query in Laravel

Can someone please guide me on how I can write this below query in laravel by using eloquent ORM and with QUERY Builder as well? The below code is in custom PHP, but I want to use it in laravel. I am trying to develop product filters with ajax request, filters are appearing in the sidebar when someone clicks on any filter then the system will fetch data from a database that is associated with filters, all my filters will be work as a checkbox. I don't know how I can achieve this variable concatenation in the laravel.

if(isset($_POST["action"])) { $query = " SELECT * FROM product WHERE product_status = '1' "; if(isset($_POST["minimum_price"], $_POST["maximum_price"]) && !empty($_POST["minimum_price"]) && !empty($_POST["maximum_price"])) { $query .= " AND product_price BETWEEN '".$_POST["minimum_price"]."' AND '".$_POST["maximum_price"]."' "; } if(isset($_POST["brand"])) { $brand_filter = implode("','", $_POST["brand"]); $query .= " AND product_brand IN('".$brand_filter."') "; } if(isset($_POST["ram"])) { $ram_filter = implode("','", $_POST["ram"]); $query .= " AND product_ram IN('".$ram_filter."') "; } if(isset($_POST["storage"])) { $storage_filter = implode("','", $_POST["storage"]); $query .= " AND product_storage IN('".$storage_filter."') "; }

$statement = $connect->prepare($query);
$statement->execute();
$result = $statement->fetchAll();
$total_row = $statement->rowCount();
$output = '';
if($total_row > 0)
{
    foreach($result as $row)
    {
        $output .= '
        <div class="col-sm-4 col-lg-3 col-md-3">
            <div style="border:1px solid #ccc; border-radius:5px; padding:16px; margin-bottom:16px; height:450px;">
                <img src="image/'. $row['product_image'] .'" alt="" class="img-responsive" >
                <p align="center"><strong><a href="#">'. $row['product_name'] .'</a></strong></p>
                <h4 style="text-align:center;" class="text-danger" >'. $row['product_price'] .'</h4>
                <p>Camera : '. $row['product_camera'].' MP<br />
                Brand : '. $row['product_brand'] .' <br />
                RAM : '. $row['product_ram'] .' GB<br />
                Storage : '. $row['product_storage'] .' GB </p>
            </div>

        </div>
        ';
    }
}
else
{
    $output = '<h3>No Data Found</h3>';
}
echo $output;

}