HTML表单下拉过滤器现在通过PHP脚本显示数据

Question

我编写了一个HTML表单，用于在下拉窗口中显示由PHP脚本提取的MYSQL TABLE中的数据。

我的问题是它显示我在HTML表单OPTION中定义为ALL的值，但它不通过PHP脚本显示数据。请帮忙

我的代码如下： -

        <form name='frmSearch' action='' method='post'>


        <label>Design Category</label>
        <select name="dlocation">
        <option value="">All</option>

        <?php
            $connection=mysql_connect('localhost','root','password','dz');
            $sql = "SELECT * FROM DEGSUBMIT GROUP BY dlocation ORDER BY dlocation";
            $sql_result = mysql_query ($sql, $connection );
            while ($row = mysql_fetch_assoc($sql_result)) {
                echo "<option value='".$row["dlocation"]."'".($row["dlocation"]==$_REQUEST["dlocation"] ? " selected" : "").">".$row["dlocation"]."</option>";
            }

            ?>
        </select>
        </form>