How to realize automatic export of employee attendance data in PHP?

How to automatically export employee attendance data in PHP?

In modern enterprises, the management of employee attendance data is a very important task. In order to facilitate the management and analysis of attendance data, many companies use automatic export to save the data as Excel or CSV files. This article will introduce how to use the PHP programming language to automatically export employee attendance data and provide specific code examples.

1. Prepare the data table

First, we need to create a table in the database to store employee attendance data. Suppose we have created a table named attendance, which contains the following fields: id (attendance record ID), employee_id (employee ID), check_in (clock time at work), check_out (time at get off work), status (attendance status), etc.

2. Connecting to the database

In PHP, we can use extensions such as MySQLi or PDO to connect to the database. The following is a sample code that uses the MySQLi extension to connect to the database:

<?php
$servername = "localhost";
$username = "root";
$password = "password";
$dbname = "mydatabase";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接是否成功
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}
?>

3. Query attendance data

Next, we need to write a PHP function to query attendance data. Below is a sample code:

<?php
function getAttendanceData($conn) {
    $sql = "SELECT * FROM attendance";
    $result = $conn->query($sql);

    if ($result->num_rows > 0) {
        $data = array();
        while ($row = $result->fetch_assoc()) {
            $data[] = $row;
        }
        return $data;
    } else {
        return false;
    }
}
?>

4. Export data to Excel file

In order to export attendance data to Excel file, we can use the PHPExcel library. First, we need to introduce the PHPExcel library into the project. You can download and unzip the library files from the PHPExcel official website to your project directory.

The following is a sample code to export attendance data to an Excel file:

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

function exportToExcel($data) {
    $objPHPExcel = new PHPExcel();
    $objPHPExcel->setActiveSheetIndex(0);
    $objPHPExcel->getActiveSheet()->setTitle('Attendance');

    $objPHPExcel->getActiveSheet()->setCellValue('A1', 'ID');
    $objPHPExcel->getActiveSheet()->setCellValue('B1', 'Employee ID');
    $objPHPExcel->getActiveSheet()->setCellValue('C1', 'Check In');
    $objPHPExcel->getActiveSheet()->setCellValue('D1', 'Check Out');
    $objPHPExcel->getActiveSheet()->setCellValue('E1', 'Status');

    $row = 2;
    foreach ($data as $row_data) {
        $objPHPExcel->getActiveSheet()->setCellValue('A' . $row, $row_data['id']);
        $objPHPExcel->getActiveSheet()->setCellValue('B' . $row, $row_data['employee_id']);
        $objPHPExcel->getActiveSheet()->setCellValue('C' . $row, $row_data['check_in']);
        $objPHPExcel->getActiveSheet()->setCellValue('D' . $row, $row_data['check_out']);
        $objPHPExcel->getActiveSheet()->setCellValue('E' . $row, $row_data['status']);
        $row++;
    }

    $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');
    $objWriter->save('attendance.xlsx');
}
?>

5. Call the function to export data

Finally, we can use a PHP These functions are called in the script to complete the automatic export of employee attendance data.

<?php
require_once 'connection.php';
require_once 'attendance.php';

$data = getAttendanceData($conn);
if ($data) {
    exportToExcel($data);
    echo "考勤数据已成功导出到attendance.xlsx文件。";
} else {
    echo "没有找到考勤数据。";
}

$conn->close();
?>

Through the above steps and sample code, we can implement automatic export of employee attendance data in PHP. You can modify and extend the code according to your own needs to adapt to different business scenarios.

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