构建人力资源管理功能的企业资源计划（ERP）系统的PHP开发

CREATE TABLE employees (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    department VARCHAR(100) NOT NULL,
    position VARCHAR(100),
    salary INT,
    hire_date DATE
);

CREATE TABLE leave_requests (
    id INT AUTO_INCREMENT PRIMARY KEY,
    employee_id INT NOT NULL,
    start_date DATE NOT NULL,
    end_date DATE NOT NULL,
    status ENUM('pending', 'approved', 'rejected') DEFAULT 'pending',
    FOREIGN KEY (employee_id) REFERENCES employees(id)
);

CREATE TABLE performance_reviews (
    id INT AUTO_INCREMENT PRIMARY KEY,
    employee_id INT NOT NULL,
    review_date DATE,
    feedback TEXT,
    FOREIGN KEY (employee_id) REFERENCES employees(id)
);

<?php
// 添加员工信息
if (isset($_POST['add_employee'])) {
    $name = $_POST['name'];
    $department = $_POST['department'];
    $position = $_POST['position'];
    $salary = $_POST['salary'];
    $hire_date = $_POST['hire_date'];

    // 将员工信息插入数据库
    // ...

    echo "员工信息添加成功！";
}

// 更新员工信息
if (isset($_POST['update_employee'])) {
    $id = $_POST['id'];
    $department = $_POST['department'];
    $position = $_POST['position'];
    $salary = $_POST['salary'];

    // 更新员工信息
    // ...

    echo "员工信息更新成功！";
}
?>

<form method="post">
    <label>姓名:</label>
    <input type="text" name="name">

    <label>部门:</label>
    <input type="text" name="department">

    <label>职位:</label>
    <input type="text" name="position">

    <label>工资:</label>
    <input type="text" name="salary">

    <label>入职日期:</label>
    <input type="date" name="hire_date">

    <button type="submit" name="add_employee">添加员工</button>
    <button type="submit" name="update_employee">更新员工信息</button>
</form>

<?php
// 处理请假请求
if (isset($_POST['submit_leave'])) {
    $employee_id = $_POST['employee_id'];
    $start_date = $_POST['start_date'];
    $end_date = $_POST['end_date'];

    // 将请假请求插入数据库
    // ...

    echo "请假请求已提交！";
}
?>

<form method="post">
    <input type="hidden" name="employee_id" value="1">

    <label>开始日期:</label>
    <input type="date" name="start_date">

    <label>结束日期:</label>
    <input type="date" name="end_date">

    <button type="submit" name="submit_leave">提交请假请求</button>
</form>

<?php
// 提交绩效评估
if (isset($_POST['submit_review'])) {
    $employee_id = $_POST['employee_id'];
    $review_date = $_POST['review_date'];
    $feedback = $_POST['feedback'];

    // 将绩效评估插入数据库
    // ...

    echo "绩效评估已提交！";
}
?>

<form method="post">
    <input type="hidden" name="employee_id" value="1">

    <label>评估日期:</label>
    <input type="date" name="review_date">

    <label>反馈意见:</label>
    <textarea name="feedback"></textarea>

    <button type="submit" name="submit_review">提交绩效评估</button>
</form>