PHP Mysql查询多个项目

<?php
// 连接数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";
$conn = new mysqli($servername, $username, $password, $dbname);

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

// 查询多个项目
$sql = "SELECT * FROM projects";
$result = $conn->query($sql);

// 检查查询结果
if ($result->num_rows > 0) {
    // 输出数据
    while($row = $result->fetch_assoc()) {
        echo "项目名称: " . $row["project_name"]. "<br>";
        echo "项目描述: " . $row["project_description"]. "<br>";
        echo "项目开始日期: " . $row["start_date"]. "<br>";
        echo "项目结束日期: " . $row["end_date"]. "<br>";
        echo "<br>";
    }
} else {
    echo "没有找到任何项目";
}

// 关闭数据库连接
$conn->close();
?>