如何将MySQL查询转换为PHP代码

$servername = "数据库主机名";
$username = "用户名";
$password = "密码";
$dbname = "数据库名称";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

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

$sql = "SELECT * FROM 表名 WHERE 条件";

$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // 循环遍历查询结果
    while ($row = $result->fetch_assoc()) {
        // 处理每行数据
    }
} else {
    echo "没有结果";
}

while ($row = $result->fetch_assoc()) {
    echo "字段1: " . $row["字段1"] . "<br>";
    echo "字段2: " . $row["字段2"] . "<br>";
    // 其他字段...
}

$conn->close();