使用PHP開發的員工績效考評報表模組在企業資源計畫（ERP）系統中的應用

CREATE TABLE employees (
    id INT PRIMARY KEY AUTO_INCREMENT,
    name VARCHAR(50),
    department VARCHAR(50)
);

CREATE TABLE evaluations (
    id INT PRIMARY KEY AUTO_INCREMENT,
    employee_id INT,
    evaluation_date DATE,
    evaluation_result DECIMAL(5, 2),
    FOREIGN KEY (employee_id) REFERENCES employees(id)
);

<?php
// 查询所有员工的信息
$sql = "SELECT * FROM employees";
$result = mysqli_query($conn, $sql);

// 以表格形式展示员工信息
echo "<table>";
echo "<tr><th>ID</th><th>姓名</th><th>部门</th></tr>";
while ($row = mysqli_fetch_assoc($result)) {
    echo "<tr><td>".$row['id']."</td><td>".$row['name']."</td><td>".$row['department']."</td></tr>";
}
echo "</table>";
?>

<?php
// 处理表单提交的数据
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $employeeId = $_POST['employeeId'];
    $evaluationDate = $_POST['evaluationDate'];
    $evaluationResult = $_POST['evaluationResult'];

    // 将数据插入数据库
    $sql = "INSERT INTO evaluations (employee_id, evaluation_date, evaluation_result) VALUES ('$employeeId', '$evaluationDate', '$evaluationResult')";
    mysqli_query($conn, $sql);

    // 提示添加成功
    echo "绩效考评添加成功！";
}

// 显示添加绩效考评表单
echo "<form method='POST'>";
echo "<label for='employeeId'>员工ID：</label>";
echo "<input type='text' name='employeeId' id='employeeId'><br>";
echo "<label for='evaluationDate'>考评日期：</label>";
echo "<input type='date' name='evaluationDate' id='evaluationDate'><br>";
echo "<label for='evaluationResult'>考评结果：</label>";
echo "<input type='text' name='evaluationResult' id='evaluationResult'><br>";
echo "<input type='submit' value='添加'>";
echo "</form>";
?>

<?php
// 查询员工绩效考评数据
$sql = "SELECT e.name, e.department, AVG(ev.evaluation_result) as avg_result
        FROM employees e
        INNER JOIN evaluations ev ON e.id = ev.employee_id
        GROUP BY e.id";
$result = mysqli_query($conn, $sql);

// 以表格形式展示员工绩效考评报表
echo "<table>";
echo "<tr><th>姓名</th><th>部门</th><th>平均绩效结果</th></tr>";
while ($row = mysqli_fetch_assoc($result)) {
    echo "<tr><td>".$row['name']."</td><td>".$row['department']."</td><td>".$row['avg_result']."</td></tr>";
}
echo "</table>";
?>