对PHP写库存管理系统中的供应商管理功能进行代码生成

以下是一个简单的PHP代码示例，用于生成库存管理系统中的供应商管理功能：

<?php
// 数据库连接配置
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "inventory_system";

// 创建数据库连接
$conn = new mysqli($servername, $username, $password, $dbname);

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

// 创建供应商表
$sql = "CREATE TABLE suppliers (
    id INT(11) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    contact_person VARCHAR(100) NOT NULL,
    email VARCHAR(100) NOT NULL,
    phone VARCHAR(20) NOT NULL,
    address VARCHAR(200) NOT NULL
)";

if ($conn->query($sql) === TRUE) {
    echo "供应商表创建成功";
} else {
    echo "供应商表创建失败: " . $conn->error;
}

// 添加供应商
function addSupplier($name, $contactPerson, $email, $phone, $address) {
    global $conn;

    $sql = "INSERT INTO suppliers (name, contact_person, email, phone, address)
            VALUES ('$name', '$contactPerson', '$email', '$phone', '$address')";

    if ($conn->query($sql) === TRUE) {
        echo "供应商添加成功";
    } else {
        echo "供应商添加失败: " . $conn->error;
    }
}

// 更新供应商信息
function updateSupplier($id, $name, $contactPerson, $email, $phone, $address) {
    global $conn;

    $sql = "UPDATE suppliers
            SET name='$name', contact_person='$contactPerson', email='$email', phone='$phone', address='$address'
            WHERE id=$id";

    if ($conn->query($sql) === TRUE) {
        echo "供应商信息更新成功";
    } else {
        echo "供应商信息更新失败: " . $conn->error;
    }
}

// 删除供应商
function deleteSupplier($id) {
    global $conn;

    $sql = "DELETE FROM suppliers WHERE id=$id";

    if ($conn->query($sql) === TRUE) {
        echo "供应商删除成功";
    } else {
        echo "供应商删除失败: " . $conn->error;
    }
}

// 获取所有供应商
function getSuppliers() {
    global $conn;

    $sql = "SELECT * FROM suppliers";
    $result = $conn->query($sql);

    if ($result->num_rows > 0) {
        // 输出数据
        while($row = $result->fetch_assoc()) {
            echo "ID: " . $row["id"]. " - 名称: " . $row["name"]. " - 联系人: " . $row["contact_person"]. " - 邮箱: " . $row["email"]. " - 电话: " . $row["phone"]. " - 地址: " . $row["address"]. "<br>";
        }
    } else {
        echo "没有供应商记录";
    }
}

// 关闭数据库连接
$conn->close();
?>

你可以根据实际需求调整上述代码，并将其与其他功能整合在一起，以构建完整的库存管理系统。