使用PHP开发的薪资核算功能在企业资源计划（ERP）系统中的应用

// 创建数据库
$servername = "localhost";
$username = "root";
$password = "password";
$dbname = "salary";

$conn = new mysqli($servername, $username, $password);

if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "CREATE DATABASE ".$dbname;
if ($conn->query($sql) === TRUE) {
    echo "Database created successfully";
} else {
    echo "Error creating database: " . $conn->error;
}

$conn->close();

// 创建员工表格
$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "CREATE TABLE employees (
    id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(30) NOT NULL,
    salary FLOAT(10,2) NOT NULL,
    position VARCHAR(30) NOT NULL
)";

if ($conn->query($sql) === TRUE) {
    echo "Table employees created successfully";
} else {
    echo "Error creating table: " . $conn->error;
}

$conn->close();

// 创建工资表格
$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "CREATE TABLE salary (
    id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    employee_id INT(6) NOT NULL,
    year INT(4) NOT NULL,
    month INT(2) NOT NULL,
    salary FLOAT(10,2) NOT NULL,
    FOREIGN KEY (employee_id) REFERENCES employees(id)
)";

if ($conn->query($sql) === TRUE) {
    echo "Table salary created successfully";
} else {
    echo "Error creating table: " . $conn->error;
}

$conn->close();

function calculateSalary($employee_id, $year, $month) {
    // 根据员工id和时间查询薪资相关信息
    $sql = "SELECT * FROM employees WHERE id = ".$employee_id;
    $result = $conn->query($sql);
    $employee = $result->fetch_assoc();
    
    // 进行薪资计算
    $salary = $employee["salary"];
    
    // 将计算结果保存到数据库中
    $sql = "INSERT INTO salary (employee_id, year, month, salary) VALUES (".$employee_id.", ".$year.", ".$month.", ".$salary.")";
    $conn->query($sql);
    
    // 返回计算结果
    return $salary;
}

// 呼叫薪资核算函数
$employee_id = 1;
$year = 2021;
$month = 10;
$salary = calculateSalary($employee_id, $year, $month);

echo "员工".$employee_id."在".$year."年".$month."月的薪资为".$salary."元。";