我对列“cena”（eng：price）的数据进行排序时遇到了一些问题。
我制作了具有多种语言的网站，我为每种语言 slike、en_slike、ger_slike（塞尔维亚语、英语、德语）制作了 3 个表格，我想在一个页面中显示它，我可以按价格（cena）和日期（slike_id）对数据进行排序），当我运行页面时，一切都很好，但是当我尝试按 cena（价格）对图片进行排序时，什么都没有发生，为什么？
这是在工作之前：
这是图片选择功能的代码，该功能在类Manage中：
public static function Select_Slike(){
if(isset($_POST['btnsort']))
{
if(isset($_POST['sort']))
{
if($_POST['sort']=="cena")
{
$query = "(select * from slike order by cena desc)
union all
(select * from en_slike order by cena desc)
union all
(select * from ger_slike order by cena desc)
";
$rez = mysql_query($query);
while($row = mysql_fetch_array($rez))
{
echo '<div id="block1"><h5 id="naslov">'.$row['naslov'].'</h5><h5 id="cena">'.$row['cena'].'</h5><img src="images/'.$row['string'].'.jpg" class="slike"/><h5 id="materijal">'.$row['materijal'].'</h5><h5 id="dimenzije">'.$row['dimenzije'].'</h5></div>';
}
}
else
{
$query = "(select * from slike order by slike_id desc)
union all
(select * from en_slike order by slike_id desc)
union all
(select * from ger_slike order by slike_id desc)
";
$rez = mysql_query($query);
while($row = mysql_fetch_array($rez))
{
echo '<div id="block1"><h5 id="naslov">'.$row['naslov'].'</h5><h5 id="cena">'.$row['cena'].'</h5><img src="images/'.$row['string'].'.jpg" class="slike"/><h5 id="materijal">'.$row['materijal'].'</h5><h5 id="dimenzije">'.$row['dimenzije'].'</h5></div>';
}
}
}
}
else
{
$query = "(select * from slike order by slike_id desc)
union all
(select * from en_slike order by slike_id desc)
union all
(select * from ger_slike order by slike_id desc)
";
$rez = mysql_query($query);
while ($row = mysql_fetch_array($rez))
{
echo '<div id="block1"><h5 id="naslov">'.$row['naslov'].'</h5><h5 id="cena">'.$row['cena'].'</h5><img src="images/'.$row['string'].'.jpg" class="slike"/><h5 id="materijal">'.$row['materijal'].'</h5><h5 id="dimenzije">'.$row['dimenzije'].'</h5></div>';
}
}
}
这是正文 php/html 代码：
<body>
<form action="" method="post">
<div id="sortiranje">
<select name="sort">
<option value="date">Datum</option>
<option value="cena">Cena</option>
</select><input type="submit" name="btnsort" value="sort"/>
</div>
</form>
<div id="slike_blok">
<?php
try{
Manage::Select_Slike();
}
catch(Exception $e){
die("<center><font size='42' color='red' weight='100'>SERVER DATABASE ERROR! ".$e->Message()."</font><center>");
}
?>
</div>
</body>