tp 遍历数据库表

$sql = "select * from news";
$data = Db::query($sql);
foreach ($data as $key => $value) {
echo $key . '<br>';
print_r($value);
echo '<br>';
foreach ($data[$key] as $key1 => $value1) {
echo $key."<br />";
echo $key1 . "<br />";
echo $value1 . "<br />";
}
}