我不知道在我的錯誤,但它說排序是不確定的,也關於無效查詢時出現錯誤:ERREUR德syntaxePrès區德「GROUP BY商城ORDER BY計數器DESC」點菜LIGNE 1PHP變量未定義錯誤(但它被定義?)
這裏是我對有關商店的顯示代碼的摘錄。
if(isset($_GET['formSubmit']))
{
$varStats = $_GET['formStats'];
$errorMessage = "";
switch($varStats)
{
case "ByAMEX": $sort = "AMEX = 1"; break;
case "ByBDOTerminal": $sort = "BDOTerminal = 'YES'"; break;
case "ByResto": $sort = "Resto = 'YES'"; break;
case "ByCashOnly": $sort = "Cash = 'YES'"; break;
case "ByPOSNotSeen": $sort = "POSNotSeen = 'YES'"; break;
}
$conn = db_connect();
sortMall($conn, $sort);
db_disconnect($conn);
exit();
}
下面是摘錄,我初始化排序功能:
function sortMall($conn, $sort)
{
$table = "test";
$column1 = "StoreName";
$column2 = "Mall";
$query1 = "Select $column2, Count($column1) AS Counter from $table where $sort GROUP BY $column2 ORDER BY Counter DESC";
$result = mysqli_query($conn, $query1);
if ($result == FALSE)
{
echo "Invalid query: " . $conn->error;
echo "<br/>";
return;
}
我其實有另一種功能,幾乎不會有相同的語法,都是一樣的,它的工作原理。我不知道爲什麼不這樣做。
哪裏是它告訴你關於未定義的變量的警告? –
在腳本開始時將變量定義爲null。像$ variable = null; –
它說,錯誤就行 sortMall($康恩,$排序); – AndyMarty