Question

我试图使用foreach循环来显示我的数据库但我总是得到错误。我想要的是打印每一行和每列。我的代码是这样的：

$sql = "SELECT a.*, b.klasifikasi FROM kl_stre as b
        INNER JOIN data_latih as a
        ON a.id_stres = b.id_stres
        ORDER BY a.id_dl";

$result = mysqli_query($conn, $sql);

foreach ($result as $dt_train => $row_dt_train):

foreach ($row_dt_train as $attr => $attr_dt_train):
echo $result[$row_dt_train][$attr_dt_trian]; // this line is the problem
endforeach;

endforeach;

我得到的错误是

警告：第43行的C：\ xampp \ htdocs \ knn \ array_db.php中的非法偏移类型

您是否介意解释此代码的错误以及如何解决此问题？

Answer 1

您需要先查看您的查询

foreach

在获取记录之后，只需删除while()并尝试使用while ($row=mysqli_fetch_array($result)) { echo $row['your database field name']; }循环

$sql = "SELECT a.*, b.klasifikasi FROM kl_stre as b
        INNER JOIN data_latih as a
        ON a.id_stres = b.id_stres
        ORDER BY a.id_dl";

$result = mysqli_query($conn, $sql);
if (!$result) {
    die('query is not correct'.mysqli_error($conn));
}
while ($row=mysqli_fetch_array($result)) {
    echo $row['your database field name'];
}

您的代码将

AnyCPU

使用Foreach循环在数组中显示DB

1 个答案: