如何使用PHP / MySQL的相同GET名称正确显示URL中的多个参数

Question

My parameters have different names ( tags, tags2, tags3 ) but the same GET method or in other words the same column name ( tags ) in the MySQL database.

Here is the code:

$tags = $_GET['tags'];
$tags2 = $_GET['tags'];
$tags3 = $_GET['tags'];

$fetch = mysqli_query($conn, "SELECT * FROM users JOIN user_images ON users.username = user_images.username WHERE tags = '$tags' AND tags = '$tags2' AND tags = '$tags3' ORDER BY users.id DESC");

Basically I am trying to display all images with 3 different tags in the user_images tables.

Here is what my URL looks like, but it only displays one tag and not all 3:

https://www.example.com/app/user-tags.php?tags=aesthetic&tags2=food&tags3=dogs

The first parameter works, but not all of them. Can anyone help me where I went wrong?

I thought about doing something likes this, having tags = aesthetic,food,dogs in the query. But the problem is that I think the result would read that as, "Find all images with the tags of aestheticfooddogs" instead of tags with aesthetic, food, and dogs.

Answer 1

It sounds like you want to look in the tags column in your table and find any matches for the values passed in the URL. If you want to find ANY of the tag values change the use of AND to OR instead.

$tags  = $_GET['tags'];
$tags2 = $_GET['tags2'];
$tags3 = $_GET['tags3'];

$fetch = mysqli_query($conn, "SELECT * FROM users
JOIN user_images ON users.username = user_images.username
WHERE tags LIKE '%" . $tags  . "%' OR
      tags LIKE '%" . $tags2 . "%' OR
      tags LIKE '%" . $tags3 . "%'
ORDER BY users.id DESC")