代码:

---

//-----------------------------------------------------------------------------------
//根据层数增加空格
//-----------------------------------------------------------------------------------
function addSpace($class_level)
{
	for($i=0;$i<$class_level;$i++)
	{
		$space = $space."　";
	}
	return $space;
}
//-----------------------------------------------------------------------------------
//获得分类数组
//-----------------------------------------------------------------------------------

function GetChild(){
	global $g_cDBBGS;
	$sql = "select class_id,parent_class_id,class_name,class_level from class where class_id <> 1";
	//echo $sql."\n";
	$g_cDBBGS->query($sql);
	$i = 0;
	while($g_cDBBGS->next_record())
	{
		$class_info[$i][class_id] = $g_cDBBGS->f(class_id);
		$class_info[$i][parent_class_id] = $g_cDBBGS->f(parent_class_id);
		$class_info[$i][class_name] = $g_cDBBGS->f(class_name);
		$class_info[$i][class_level] = $g_cDBBGS->f(class_level);
		$class_info[$i][showed] = 0;
		$i++;
	}
	return $class_info;
}

//-----------------------------------------------------------------------------------
//获得子类(分析数组)
//-----------------------------------------------------------------------------------
function ShowClasses($class_info){
	$total_class = count($class_info);
	//echo "\$class_info[\$class_level][\$parent_class_id][\$class_id]<BR>\n";
	//echo $ct_class_level."<BR>\n";
	echo "showed \$i　\$j　class_level　class_id　parent_class_id　class_name<BR>\n";
	for($i=0;$i<$total_class;$i++){
		if($class_info[$i][showed] == 0)
		{
			$class_info[$i][showed] = 1;
			echo "循环外".$class_info[$i][showed]."　".$i."　".$j."　".$class_info[$i][class_level]."　".$class_info[$i][class_id]."　".$class_info[$i][parent_class_id]."　".addSpace($class_info[$i][class_level]).$class_info[$i][class_name]."<BR>\n";
		
			for($j=0;$j<$total_class;$j++){
				if($class_info[$j][parent_class_id] == $class_info[$i][class_id] && $class_info[$j][showed] == 0)
				{
					$class_info[$j][showed] = 1;
					echo "循环内".$class_info[$j][showed]."　".$i."　".$j."　".
						$class_info[$j][class_level]."　".$class_info[$j][class_id]."　".					$class_info[$j][parent_class_id]."　".addSpace($class_info[$j][class_level]).
						$class_info[$j][class_name]."<BR>\n";
				}
			}
		}
	}
}

---

代码:

---

//-----------------------------------------------------------------------------------
//根据层数增加空格
//-----------------------------------------------------------------------------------
function addSpace($class_level)
{
	//$space = "";
	for($i=2;$i<$class_level;$i++)
	{
		$space = $space."　";
	}
	return $space;
}

//-----------------------------------------------------------------------------------
//递归获得目录树
//-----------------------------------------------------------------------------------
function ShowClasses($level,$parent_class_id){
	//global $g_cDBBGS;
	$g_cDBBGS[$level] = new dbconn;

	$sql = "select class_id,class_name,parent_class_id,class_level from class where length(class_level)/3 = $level and parent_class_id = $parent_class_id";
	//echo $sql."<BR>\n";
	$g_cDBBGS[$level]->query($sql);
	//echo $g_cDBBGS->nr()."<BR>\n";
	while($g_cDBBGS[$level]->next_record())
	{
		$class_id = $g_cDBBGS[$level]->f(class_id);
		$class_name = $g_cDBBGS[$level]->f(class_name);
		$parent_class_id = $g_cDBBGS[$level]->f(parent_class_id);
		$class_level = $g_cDBBGS[$level]->f(class_level);
		
		echo "<option value=$class_id>".addSpace($level)."　".$class_name."</option>\n";
		$level_ct = $level + 1;
		ShowClasses($level_ct,$class_id);
	}
}

---