Tree View Dropdown Menu
I have such a categories MySQL table: ID | name | parent and have such a function that displays the categories in a SELECT element as a drop-down menu:
function DD_ProjectCategories($parent=0) {
include("db.php");
$query = "SELECT ID,name FROM categories";
$result = mysql_query($query) or die(mysql_error());
echo '<select name="parentcategory">'
echo '<option value="">Choose a parent category</option>'
echo '<option value="0">Root Category</option>'
while ($row = mysql_fetch_array($result)) {
echo "<option value="$row[0]""; if ($parent == $row[0]) {echo " selected"; } echo ">$row[1]</option>";
}
echo "</select>";
unset($query,$result,$row);
}.....
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