create_product.php

<?php
// include database and object files
include_once 'config/database.php';
include_once 'objects/product.php';
include_once 'objects/category.php';

// get database connection
$database = new Database();
$db = $database->getConnection();

// pass connection to objects
$product = new Product($db);
$category = new Category($db);
$page_title = "Create Product";
include_once "layout_header.php";

echo "<div class='right-button-margin'>";
    echo "<a href='index.php' class='btn btn-default pull-right'>Read Products</a>";
echo "</div>";

?>
<?php
// if the form was submitted - PHP OOP CRUD Tutorial
if($_POST){

    // set product property values
    $product->name = $_POST['name'];
    $product->price = $_POST['price'];
    $product->description = $_POST['description'];
    $product->category_id = $_POST['category_id'];

    // create the product
    if($product->create()){
        echo "<div class='alert alert-success'>Product was created.</div>";
    }

    // if unable to create the product, tell the user
    else{
        echo "<div class='alert alert-danger'>Unable to create product.</div>";
    }
}
?>

<!-- HTML form for creating a product -->
<form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>" method="post">

    <table class='table table-hover table-responsive table-bordered'>

        <tr>
            <td>Name</td>
            <td><input type='text' name='name' class='form-control' /></td>
        </tr>

        <tr>
            <td>Price</td>
            <td><input type='text' name='price' class='form-control' /></td>
        </tr>

        <tr>
            <td>Description</td>
            <td><textarea name='description' class='form-control'></textarea></td>
        </tr>

        <tr>
            <td>Category</td>
            <td>
              <?php
  // read the product categories from the database
  $stmt = $category->read();

  // put them in a select drop-down
  echo "<select class='form-control' name='category_id'>";
      echo "<option>Select category...</option>";

      while ($row_category = $stmt->fetch(PDO::FETCH_ASSOC)){
          extract($row_category);
          echo "<option value='{$id}'>{$name}</option>";
      }

  echo "</select>";
  ?>
            </td>
        </tr>

        <tr>
            <td></td>
            <td>
                <button type="submit" class="btn btn-primary">Create</button>
            </td>
        </tr>

    </table>
</form>
<?php

// footer
include_once "layout_footer.php";
?>