php mysqli查詢將不起作用

Question

我試圖增加表中的值，但我不知道mysql，我不知道什麼是錯的。它似乎沒有問題，但當我檢查數據庫的數量沒有改變。提前致謝！ :)

$con = mysqli_connect($db_host, $db_user, $db_pass, $db_name); 

if (mysqli_connect_errno()) { 
    echo "Failed to connect to MySQL: " . mysqli_connect_error(); 
} else { 
    echo "it works!"; 
} 

switch ($_POST['found']) { 
    case "facebook": 
     mysqli_query($con,"UPDATE `found` SET `number` = 'number + 1' WHERE `id` = 'Facebook'"); 


     break; 

Answer 1

試試這個：

case "facebook": 
    mysqli_query($con,"UPDATE `found` SET number = number + 1 WHERE `id` = 'Facebook'") or die(mysqli_error($con)); 

希望這有助於。