SQlite3 $ rows中不需要的键

Question

If a row in my SQlite3 table called 'data' looks like this:

Gorilla|10|Black

And I'm getting it with this PHP:

$returned = array();

$result = $db->query("SELECT * FROM data");

foreach($result as $row) {
    $returned[] = $row;
}

echo json_encode($returned);

The resulting parsed JS Object in Array looks like this:

[{
  0: Gorilla,
  1: 10,
  2: Black,
  Age: 10,
  Animal: Gorilla,
  Color: Black
}]

Why are there 6 properties yet only 3 columns in the DB? I would like to be rid of the first 3 properties of the object and return only:

[{
  Age: 10,
  Animal: Gorilla,
  Color: Black
}]

How? :)

Answer 1

This is the default behaviour of SQLiteDatabase::query . As specified in the documentation :

The optional result_type parameter accepts a constant and determines how the returned array will be indexed. Using SQLITE_ASSOC will return only associative indices (named fields) while SQLITE_NUM will return only numerical indices (ordinal field numbers). SQLITE_BOTH will return both associative and numerical indices. SQLITE_BOTH is the default for this function.

So write:

$result = $db->query("SELECT * FROM data", SQLITE_ASSOC);

EDIT for PDO

As you connect using PDO, the syntax becomes:

$result = $db->query("SELECT * FROM data", PDO::FETCH_ASSOC);