MYSQLI查詢得到一個單一的結果

Question

我只需要從mysql數據庫中得到用戶名是X的成員的id。 這隻能用while循環完成，還是有其他解決方法？

我在想什麼的是一樣的東西：

$id = mysqli_query($con,'SELECT id FROM membrs WHERE username = '$username' LIMIT 1) 

感謝，

Answer 1

您可以使用：

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) 

Answer 2

不while循環，我們可以通過下面的代碼做到這一點，如果你是選擇超過1個記錄您需要循環它

$row = mysqli_fetch_array($id); 
echo $row['id']; 

Answer 3

爲了得到它在同一行（無需對$id_get變量）：

$id = mysqli_fetch_array(mysqli_query($con, "SELECT id FROM membrs WHERE username='$username' LIMIT 1"));

然後顯示它，只是做echo $id['id'];。