Question

这是我的MySQL代码： $ sql =“SELECT * FROM ProductManagement ORDER BY ID ASC;”; $ result = $ connection-＆gt; query（$ sql）; if（$ result-＆gt; num_rows＆gt; 0）{ echo“＆lt; p＆gt;＆lt; table＆gt; ＆LT; TR＆GT; ＆LT的第i; ID＆LT; /第＆GT; ＆lt; th＆gt;电影名称＆lt; / th＆gt; ＆LT的第i;制作＆LT; /第＆GT; ＆lt; th＆gt;发布年份＆lt; / th＆gt; ＆LT的第i;股票及LT; /第＆GT; ＆LT的第i;价格＆LT; /第＆GT; ＆LT的第i;作用＆LT; /第＆GT; ＆LT; / TR＆gt;“中; while（$ row = $ result-＆gt; fetch_assoc（））{ 回声“ ＆LT; TR＆GT; ＆LT; TD＆gt; “中[ID ”]。“ ＆LT $行。”; / TD＆GT; ＆LT; TD＆gt; “中[FilmName ”]。“ ＆LT $行。”; / TD＆GT; ＆LT; TD＆gt; “中$行。[ ”生产者“]。” ＆LT; / TD＆GT; ＆LT; TD＆GT;＆LT “$行[ 'YearPublished']。”; / TD＆GT; ＆LT; TD＆GT;＆LT “$行[ '库存']。”; / TD＆GT; ＆LT; TD＆GT;＆LT “$行[ '价格']。”; / TD＆GT; ＆lt; td＆gt;＆lt; a href = \“edit.php？ID =”。$ row [“ID”]。“\”＆gt;编辑＆lt; / a＆gt; ＆lt; td＆gt;＆lt; a href = \“delete.php？ID =”。$ row [“ID”]。“\”＆gt;删除＆lt; / a＆gt; ＆LT; / TR＆gt;“中; } echo“＆lt; / table＆gt;”; } 其他{ echo“0结果”; } $ sort = @ $ _ POST ['order']; if（$ _GET ['sortby'] =='1'） { “SELECT * FROM ProductManagement ORDER BY FilmName ASC”; } elseif（$ _GET ['sortby'] =='2'） { “SELECT * FROM ProductManagement ORDER BY FilmName DESC”; } 表格代码在这里：＆lt; form name =“sort”action =“”method =“post”＆gt; ＆lt; select name =“sortby”＆gt; ＆lt; option value =“1”＆gt;电影名称 - 升序＆lt; /选项＆gt; ＆lt; option value =“2”＆gt;电影名称 - 降序＆lt; /选项＆gt; ＆lt; input type =“submit”value =“Sort”/＆gt; ＆LT; /选择＆GT; ＆LT;形式＆GT; 我试图通过电影名称按升序或降序对表格进行排序。但是，当我单击任一按钮的提交时，数据库不会执行任何操作并且没有任何操作。我该怎么办？谢谢

Answer 1

根据@AshishChoudhury的建议，您需要使用$_POST['sortby'] 而不是使用$_GET['sortby']，因为您的表单使用POST而不是GET。

使用这个

if (isset($_POST['sortby']) && $_POST['sortby'] == '1')
{
    $sql = "SELECT * FROM ProductManagement ORDER BY FilmName ASC";
}
elseif (isset($_POST['sortby']) && $_POST['sortby'] == '2')
{
    $sql = "SELECT * FROM ProductManagement ORDER BY FilmName DESC";
}
else 
{
    $sql = "SELECT * FROM ProductManagement ORDER BY ID ASC;";
}
$result = $connection->query($sql);

if ($result->num_rows > 0) {
    echo "<p><table>
    <tr>
    <th>ID</th>
    <th>Film Name</th>
    <th>Producer</th>
    <th>Year Published</th>
    <th>Stock</th>
    <th>Price</th>
    <th>Function</th>
    </tr>";
    while($row = $result->fetch_assoc()) {
  echo "
    <tr>
        <td>".$row["ID"]."</td>
        <td>".$row["FilmName"]."</td>
        <td>".$row["Producer"]."</td>
        <td>".$row['YearPublished']."</td>
        <td>".$row['Stock']."</td>
        <td>".$row['Price']."</td>
        <td><a href=\"edit.php?ID=".$row["ID"]."\">Edit</a>
        <td><a href=\"delete.php?ID=".$row["ID"]."\">Delete</a>
    </tr>";
    }
    echo "</table>";
} 
else {
    echo "0 results";
}

Answer 2

我认为您应该将线重新排列为下面的内容

$sort = @$_POST['order'];

if (isset($_POST['sortby']) && $_POST['sortby'] == '1')
{
    $sql = "SELECT * FROM ProductManagement ORDER BY FilmName ASC";
}
elseif (isset($_POST['sortby']) && $_POST['sortby'] == '2')
{
    $sql = "SELECT * FROM ProductManagement ORDER BY FilmName DESC";
}
else 
{
    $sql = "SELECT * FROM ProductManagement ORDER BY ID ASC;";
}
$result = $connection->query($sql);

if ($result->num_rows > 0) {
    echo "<p><table>
    <tr>
    <th>ID</th>
    <th>Film Name</th>
    <th>Producer</th>
    <th>Year Published</th>
    <th>Stock</th>
    <th>Price</th>
    <th>Function</th>
    </tr>";
    while($row = $result->fetch_assoc()) {
  echo "
    <tr>
        <td>".$row["ID"]."</td>
        <td>".$row["FilmName"]."</td>
        <td>".$row["Producer"]."</td>
        <td>".$row['YearPublished']."</td>
        <td>".$row['Stock']."</td>
        <td>".$row['Price']."</td>
        <td><a href=\"edit.php?ID=".$row["ID"]."\">Edit</a>
        <td><a href=\"delete.php?ID=".$row["ID"]."\">Delete</a>
    </tr>";
    }
    echo "</table>";
} 
else {
    echo "0 results";
}

Answer 3

我认为这是您的查询

$sql = "SELECT * FROM ProductManagement ORDER BY ID ASC;";

你要重新排序

所以在它之前你应该选择GET或POST，但是例如我将使用post

$order = $_POST['order'];// this can be DESC or ASC

然后将$ order放入查询

$sql = "SELECT * FROM ProductManagement ORDER BY FilmName $order;";

所以在您的查询结果发布后，结果会发生变化

Answer 4

$ sort = $ _POST [＆＃39; order＆＃39;];

$ sortBy =（isset（$ _ GET [＆＃39; sortby＆＃39;]）＆amp;＆amp; $ _GET [＆＃39; sortby＆＃39;]！= 0）？$ _ GET [＆＃39; sortby＆＃39;]：0;

开关（$ sortBy）{

case "1":

    $sql = "SELECT * FROM ProductManagement ORDER BY FilmName ASC";

    break;

case "2":

    $sql = "SELECT * FROM ProductManagement ORDER BY FilmName DESC";

    break;

default:

    $sql = "SELECT * FROM ProductManagement ORDER BY FilmName ASC";

}

$ result = $ connection-＆gt; query（$ sql）;

if（$ result-＆gt; num_rows＆gt; 0）{

echo "<p><table>
<tr>
<th>ID</th>
<th>Film Name</th>
<th>Producer</th>
<th>Year Published</th>
<th>Stock</th>
<th>Price</th>
<th>Function</th>
</tr>";

while($row = $result->fetch_assoc()) {

回声＆＃34; ＆＃34; $行[＆＃34; ID＆＃34;]＆＃34;

    <td>".$row["FilmName"]."</td>

    <td>".$row["Producer"]."</td>

    <td>".$row['YearPublished']."</td>

    <td>".$row['Stock']."</td>

    <td>".$row['Price']."</td>

    <td><a href=\"edit.php?ID=".$row["ID"]."\">Edit</a>

    <td><a href=\"delete.php?ID=".$row["ID"]."\">Delete</a>

</tr>";

}

echo "</table>";

}

否则 {

echo "0 results";

}

Answer 5

现在看到我更新了我的代码检查它。现在它的工作。

$sort = @$_POST['order'];

    if (isset($_POST['sortby']) && $_POST['sortby'] == '2')
    {
        $sql = "SELECT * FROM ProductManagement ORDER BY FilmName DESC";
    }
    else
    {
        $sql = "SELECT * FROM ProductManagement ORDER BY FilmName ASC";
    }



      $result = $connection->query($sql);

    if ($result->num_rows > 0) {
        echo "<p><table>
        <tr>
        <th>ID</th>
        <th>Film Name</th>
        <th>Producer</th>
        <th>Year Published</th>
        <th>Stock</th>
        <th>Price</th>
        <th>Function</th>
        </tr>";
        while($row = $result->fetch_assoc()) {
      echo "
        <tr>
            <td>".$row["ID"]."</td>
            <td>".$row["FilmName"]."</td>
            <td>".$row["Producer"]."</td>
            <td>".$row['YearPublished']."</td>
            <td>".$row['Stock']."</td>
            <td>".$row['Price']."</td>
            <td><a href=\"edit.php?ID=".$row["ID"]."\">Edit</a>
            <td><a href=\"delete.php?ID=".$row["ID"]."\">Delete</a>
        </tr>";
        }
        echo "</table>";
    } 
    else {
        echo "0 results";
    }

$ _ POST使用，因为在你的表单中方法=“post”

使用<select>对mysql数据库进行排序但没有任何反应

5 个答案: