How to use PHP to write sales report generation function code in the inventory management system

How to use PHP to write sales report generation function code in the inventory management system

In modern enterprise management, accurate sales reports are very important for business decision-making and development. A complete inventory management system should include the function of generating sales reports, so that companies can understand sales through reports and formulate sales strategies and decisions.

This article will introduce how to use PHP to write the sales report generation function code in the inventory management system. The following will be divided into three parts to explain: database connection, data query and report generation.

1. Database connection

First, we need to connect to the database. It is assumed that the database has been created and contains the sales information table. Use PHP's mysqli extension library to connect to the MySQL database.

<?php
$host = "localhost"; //数据库主机地址
$username = "root"; //数据库用户名
$password = "password"; //数据库密码
$dbname = "inventory"; //数据库名

//连接到数据库
$mysqli = new mysqli($host, $username, $password, $dbname);

//检查连接是否成功
if ($mysqli->connect_error) {
    die("连接数据库失败: " . $mysqli->connect_error);
}
?>

2. Data query

Next, we need to query relevant data from the database according to the required report requirements. Here is an example of querying sales records within a certain time range.

<?php
//查询某个时间段内的销售记录
$start_date = "2022-01-01";
$end_date = "2022-06-30";

$sql = "SELECT * FROM sales WHERE sale_date BETWEEN '{$start_date}' AND '{$end_date}'";

$result = $mysqli->query($sql);

if ($result->num_rows > 0) {
    //处理查询结果
    while ($row = $result->fetch_assoc()) {
        //对每一行数据进行报表生成的逻辑操作
        //可以将数据存储到一个数组或者其他数据结构中，用于后续的报表生成操作
    }
} else {
    echo "没有找到符合条件的销售记录";
}

$result->free(); //释放查询结果集内存
?>

3. Report generation

Finally, based on the queried data, we can use some libraries or frameworks in PHP to generate reports. Here we take using the PHPExcel library to generate Excel reports as an example.

First, download and introduce the PHPExcel library, and then generate Excel reports based on the query results.

<?php
require_once 'PHPExcel/PHPExcel.php';

$excel = new PHPExcel();

//设置报表属性
$excel->getProperties()
    ->setCreator("Your Name")
    ->setTitle("Sales Report")
    ->setDescription("Sales report generated by PHPExcel");

//创建一个工作表
$sheet = $excel->getActiveSheet();
$sheet->setTitle("Sales");

$row = 1; //起始行

//输出查询结果
$sql = "SELECT * FROM sales WHERE sale_date BETWEEN '{$start_date}' AND '{$end_date}'";
$result = $mysqli->query($sql);

while ($row_data = $result->fetch_assoc()) {
    $col = 1; //起始列
    foreach ($row_data as $value) {
        $sheet->setCellValueByColumnAndRow($col, $row, $value);
        $col++;
    }
    $row++;
}

$result->free();

//保存为Excel文件
$writer = PHPExcel_IOFactory::createWriter($excel, 'Excel2007');
$writer->save("sales_report.xlsx");
?>

Through the above code example, we can realize the function of generating sales reports in the inventory management system. Of course, this is just a basic example. In actual applications, more complex data query and report generation operations may be required based on actual needs. When writing an inventory management system, we can expand and optimize it according to business needs and system functions to meet the needs of the enterprise.

To sum up, using PHP to write the sales report generation function code in the inventory management system requires the following steps: first connect to the database, then perform data query, and finally generate a report based on the query results. By writing these codes, you can better understand your sales situation, optimize your sales strategy, and thus promote the development of your enterprise.

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