问题
I need to get only the id of member who's username is X from the mysql database. Can this only be done with a while loop or is there any other way around this?
What I'm thinking of is something like:
$id = mysqli_query($con,'SELECT id FROM membrs WHERE username = '$username' LIMIT 1)
Thanks,
回答1:
You can use:
mysqli_fetch_array();
// For Instance
$id_get = mysqli_query($con, "SELECT id FROM membrs WHERE username='$username' LIMIT 1");
$id = mysqli_fetch_array($id_get);
echo $id['id']; // This will echo the ID of that user
// What I use is the following for my site:
$user_get = mysqli_query($con, "SELECT * FROM members WHERE username='$username'");
$user = mysqli_fetch_array($user);
echo $user['username']; // This will echo the Username
echo $user['fname']; // This will echo their first name (I used this for a dashboard)
回答2:
without while loop we can do it by the following code, if you are selecting more than 1 record you need to loop it
$row = mysqli_fetch_array($id);
echo $row['id'];
来源：https://stackoverflow.com/questions/19262748/mysqli-query-to-get-one-single-result