PHP implements postal code query function

Postal code is a coding method specified by the postal department and is used to identify the address of the mail destination. In real life, people often need to look up the zip code of a certain place in order to mail letters or receive goods. This article will introduce how to use PHP language to implement the postal code query function.

1. Data source

The data source of postal code can be obtained through the network or locally. Here we choose to obtain it from the network. The State Post Bureau provides a free postal code query API that can be used to obtain postal codes across the country. We can get zip code data by accessing this API.

2. Get data

You can easily access the API interface and obtain data through PHP language. The following is a sample code to obtain data:

$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, "http://api.youbianku.com/api/address?region=广州&street=天河路");
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
$result = curl_exec($curl);
curl_close($curl);

Where, http://api.youbianku.com/api/address is the address of the API interface. We can query the postal codes of different places by setting different parameters. In this example, we take Tianhe Road, Guangzhou City as an example to query the postal code.

3. Parse data

After obtaining the data, we need to parse it into array format for further processing. The following is a sample code for parsing data:

$data = json_decode($result, true);

In the above code, the json_decode function can parse JSON format data into array format. We store the parsed data in the variable $data.

4. Display results

Finally, we need to display the query results to the user in the form of a page. The following is a sample code that displays the results:

echo '查询结果：<br>';
foreach ($data as $item) {
    echo '邮政编码：' . $item['zipcode'] . '<br>';
    echo '地址：' . $item['province'] . $item['city'] . $item['district'] . $item['street'] . '<br>';
}

In the above code, we first output a prompt message "Query results:", and then loop through each query result to output the postal code and address information separately. Users can quickly obtain the postal code of the target address based on the query results.

The complete code is as follows:

$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, "http://api.youbianku.com/api/address?region=广州&street=天河路");
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
$result = curl_exec($curl);
curl_close($curl);

$data = json_decode($result, true);

echo '查询结果：<br>';
foreach ($data as $item) {
    echo '邮政编码：' . $item['zipcode'] . '<br>';
    echo '地址：' . $item['province'] . $item['city'] . $item['district'] . $item['street'] . '<br>';
}

Summary:

This article introduces how to use PHP language to implement the postal code query function. Obtain postal code data through the network, use PHP functions to process the data and display the query results to the user. This method is simple to implement and can be used as a reference for beginners.

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