Question

我需要关系：一个与时间相关，一个在提交表单后所选时间进入。我正在尝试创建一个应该排序的下拉菜单。如果已经占用的时隙仍应显示在下拉列表中，但是已禁用。例如。 9,10：占用，11 ......等等。此时占用的插槽位于菜单的底部。我怎样才能实现，它们应该出现在应有的位置。到目前为止，这是我的代码：

$query = "SELECT stunde FROM zeiten WHERE buchbar = 2 and
NOT EXISTS (SELECT *
FROM raumbuchung
WHERE zeiten.stunde =
raumbuchung.zeitanfang and belegt = 'belegt');
SELECT zeitanfang, belegt from
raumbuchung where belegt = 'belegt'";

echo "Beginn der Veranstaltung: ";
echo "<select name='time' id='t1'>";
if (mysqli_multi_query($conn, $query)) {
    do {
        if ($result = mysqli_store_result($conn)) {
            while ($row = mysqli_fetch_assoc($result)) {
                if ($row[belegt]) {
                echo "<option value=$row[zeitanfang] disabled>$row[zeitanfang]: $row[belegt]</option>";
                }
                else {
                    echo "<option value=$row[stunde]>$row[stunde]</option>";
                }
            }
        }
    }
        while(mysqli_next_result($conn)); 
        }

也许有人可以帮助我？

Answer 1

首先将它们存储在单独的数组中，然后按照您的意愿填充。

$query = "SELECT stunde FROM zeiten WHERE buchbar = 2 and
NOT EXISTS (SELECT *
FROM raumbuchung
WHERE zeiten.stunde =
raumbuchung.zeitanfang and belegt = 'belegt');
SELECT zeitanfang, belegt from
raumbuchung where belegt = 'belegt'";
$occupied_arr = array();
$available_arr = array();
if (mysqli_multi_query($conn, $query)) {
    do {
        if ($result = mysqli_store_result($conn)) {
            while ($row = mysqli_fetch_assoc($result)) {
                if ($row['belegt']) {
                    $occupied_arr[] = $row;
                }
                else {
                    $available_arr[] = $row;
                }
            }
        }
    }
    while(mysqli_next_result($conn));
 }

echo "Beginn der Veranstaltung: ";
echo "<select name='time' id='t1'>";
foreach ($available_arr as $key => $value) {
    echo "<option value=".$value['stunde'].">".$value['stunde']."</option>";
}
foreach ($occupied_arr as $key => $value) {
    echo "<option value=".$value['zeitanfang']."disabled>".$value['zeitanfang'].": ".$value['belegt']."</option>";
}
echo "</select>";

为下拉菜单

1 个答案: