PHP从多个表中获取数据

Question

I'm trying to fetch data from ring_desc table the column name is get_name here is my code:

$query= mysqli_query($con, "SELECT * FROM LIST l, ring_desc r where l.user_id=$cook_val 
and l.img_id=r.id");

while($row=mysqli_fetch_array($query)){
$name = $row['get_name'];

When I add $row['id'] which is column of List table it runs fine, but when I run this with get_name it says:

Notice: Undefined variable: get_name

Answer 1

Try this,

$query= mysqli_query($con, "SELECT l.*,r.* FROM LIST l, ring_desc r where l.user_id=$cook_val 
and l.img_id=r.id");

Answer 2

试试这个查询：

SELECT l.*,r.* FROM LIST l inner join ring_desc r on l.img_id=r.id where l.user_id=$cook_val

Answer 3

mysqli_fetch_array-以数字数组的形式获取结果行，因此使用

   $name = $row[3]