PHP implements product search and filtering skills in WeChat mini programs

With the popularity of WeChat mini programs, more and more merchants are beginning to enter the WeChat mini program platform to sell goods. In mini programs, product search and filtering functions are very important, as they can help users quickly find the products they need, thereby improving shopping efficiency. As a commonly used back-end programming language, PHP can implement product search and filtering functions in WeChat mini programs.

1. Product search

1. Database design

First, you need to create a product table in the database, including the following fields:

• Product number
• Product name
• Product description
• Product price
• Product inventory
• Product image path
• Product classification

2. PHP code implementation

Before implementing product search, you need to obtain the keywords entered by the user. The code is as follows:

$keyword = isset($_POST['keyword']) ? $_POST['keyword'] : '';

Next, query the database through SQL statements. The code is as follows:

$sql = "SELECT * FROM goods WHERE name LIKE '%$keyword%' OR description LIKE '%$keyword%'";
$result = mysqli_query($conn, $sql);

The LIKE statement is used here for fuzzy query, and % represents any character. If the keyword entered by the user appears in the product name or description, the product information will be returned in the results.

Finally, the query results are output to the mini program page. The code is as follows:

while ($row = mysqli_fetch_array($result, MYSQLI_ASSOC)) {
    $response[] = array(
        'id' => $row['id'],
        'name' => $row['name'],
        'description' => $row['description'],
        'price' => $row['price'],
        'stock' => $row['stock'],
        'image' => $row['image']
    );
}

echo json_encode($response);

Here, the query results are converted into JSON format and then output to the mini program page.

2. Product filtering

1. Database design

In the product table, add a new field category to represent the product classification. Through category filtering, users can quickly find the products they need. A classification table needs to be created in the database, containing the following fields:

• Category number
• Category name

At the same time, add the foreign key category_id to the product table , indicating the category to which the product belongs.

2. PHP code implementation

First, get the category number selected by the user. The code is as follows:

$category_id = isset($_POST['category_id']) ? $_POST['category_id'] : 0;

If the user selects a category, filter according to the category :

if ($category_id > 0) {
    $sql = "SELECT * FROM goods WHERE category_id = $category_id";
} else {
    $sql = "SELECT * FROM goods";
}

$result = mysqli_query($conn, $sql);

If the user does not select a category, all product information will be queried.

Finally, output the query results to the mini program page.

3. Summary

Through PHP language, the product search and filtering functions in WeChat mini programs can be easily realized. During the implementation process, it is necessary to properly design the database, write efficient SQL statements, and process the query results and output them to the mini program page. Product search and filtering functions not only improve users’ shopping efficiency, but are also an important means for merchants to increase sales.

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