How to use PHP to develop the dish search function of the ordering system?

How to use PHP to develop the dish search function of the ordering system?

Introduction:

With the development of technology and the improvement of people's living standards, more and more restaurants are beginning to introduce ordering systems to improve efficiency and meet customer needs. As one of the core functions of the ordering system, the dish search function is indispensable. This article will introduce how to use PHP to develop the dish search function of the ordering system to provide readers with a practical development method.

1. Demand analysis:
Before developing the dish search function, a demand analysis needs to be performed first. Generally speaking, the dish search function should include the following needs:

1. Search by dish name: Users can search based on the name of the dish to quickly locate the required dish;
2. Search by dish category: Users can search based on dish category (such as staple food, soup, beverage, etc.) to quickly browse the dishes under the category;
3. Advanced search: Users can perform advanced search to find dishes that meet your requirements based on different filter criteria (such as price range, taste preference, etc.).

2. Database design:
Before developing the dish search function, the database needs to be designed first. The dish data should be stored in a dish table, and the fields of the table should include dish ID, dish name, price, category, etc. In addition, a dish category table can be used to store the category information of the dishes.

3. Development steps:

1. Create database connection:
   First, you need to create a database connection for subsequent database operations. Database connections can be achieved using PHP's MySQLi extension.

2. Implement the search function by dish name:
   After the user enters the dish name, he can query the dish data that meets the conditions from the dish table through SQL statements. For example:

   $keyword = $_GET['keyword']; // 获取用户输入的关键字
   $sql = "SELECT * FROM dishes WHERE dish_name LIKE '%$keyword%'";
   $result = mysqli_query($connection, $sql);

3. Implement the search function by dish category:
   In the dish category table, different dish categories can be stored, such as "staple food", "soup", "beverage" "wait. After the user selects the corresponding category, he can query the dish data that meets the conditions from the dish table through the category ID. For example:

   $category = $_GET['category']; // 获取用户选择的菜品类别
   $sql = "SELECT * FROM dishes WHERE category_id = $category";
   $result = mysqli_query($connection, $sql);

4. Implement advanced search function:
   After users select the corresponding filter conditions, they can implement advanced search by combining SQL statements. For example, the user can select dishes whose prices are within a certain price range:

   $minPrice = $_GET['min_price']; // 获取用户选择的最低价格
   $maxPrice = $_GET['max_price']; // 获取用户选择的最高价格
   $sql = "SELECT * FROM dishes WHERE price BETWEEN $minPrice AND $maxPrice";
   $result = mysqli_query($connection, $sql);

4. Page display:
Finally, display the queried dish data to the user. You can use a loop to traverse the result set and implement page display and style design through HTML and CSS.

Conclusion:

Through the above steps, we can use PHP to develop a simple dish search function to add a better user experience to the ordering system. Of course, this is just a simple example. In actual development, other functions can be combined for comprehensive development to meet more needs. I hope this article will be helpful to develop the dish search function of the ordering system using PHP.

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