使用PHP数组实现无限分类，不使用数据库，不使用递归.

class cat
{
public $data;

public function __construct()
{
@include "data.php";
$this->data = $class;
}


public function CreateSortLevel($fatherlevel)
{
if(empty($fatherlevel))
{
if(is_array($this->data))
{
$fast_level = array();
foreach($this->data as $value)
{
if(strlen($value["sortlevel"]) == 3)
{
$fast_level[] = $value["sortlevel"];
}
}
$max_fast_level = max($fast_level);
unset($fast_level);
$sub = ceil($max_fast_level) + 1;
switch(strlen($sub))
{
case 1:
return "00{$sub}";
break;
case 2:
return "0{$sub}";
break;
case 3:
return $sub;
break;
}
}
else
{
return "001";
}
}

foreach($this->data as $val)
{
if(eregi("^".$fatherlevel.".{3}$",$val["sortlevel"]))
{
$level[] = $val["sortlevel"];
}
}
if(is_array($level))
{
$max_two_level = max($level);
$sub = ceil(substr($max_two_level,-3)) + 1;
switch(strlen($sub))
{
case 1:
return substr($max_two_level,0,strlen($max_two_level)-1).$sub;
break;
case 2:
return substr($max_two_level,0,strlen($max_two_level)-2).$sub;
break;
case 3:
return substr($max_two_level,0,strlen($max_two_level)-3).$sub;
break;
}
}
else
{
return $fatherlevel."001";
}
}

public function orders()
{
$op = $this->data;
$this->array_usort($op,"sortlevel",SORT_ASC);
return $op;
}

public function add_cat($sortname,$sortlevel)
{
$data = time();
$arr = array
(
"{$data}" => array
(
"sortname" => $sortname,
"sortlevel" => $this->CreateSortLevel($sortlevel)
)
);
$rs = $this->data + $arr;
$this->add_wirte($rs);
}

private function array_usort(&$array)
{
$args = func_get_args();
for($i=1,$cmd='',$size=count($args);$i<$size;$i++)
{
$num = $i;
$order = "";
$con = "@strcmp($a['$args[$num]'],$b['$args[$num]'])";
while(++$i <$size)
{
if($args[$i] === SORT_NUMERIC)
{
$con = "($a['$args[$num]']-$b['$args[$num]'])";
}
else if($args[$i] === SORT_DESC)
{
$order = "-1*";
}
else if(is_string($args[$i]))
{
$i--;
break;
}
}
$cmd .= "if($num = $con)return $order$num;else ";
if($order != '')
{
$i++;
}
}
@usort($array,@create_function('$a,$b',"$cmd return 0;"));
}

public function wirte($sortname,$sortlevel)
{
$array = " $array .= '$class = array'."rn(rn";
$array .= ' "'.time().'" => array'."rn";
$array .= ' ('."rn";
$array .= ' "sortname" => "'.$sortname.'"'.",rn";
$array .= ' "sortlevel" => "'.$this->CreateSortLevel($sortlevel).'"'."rn";
$array .= ' )'."rn";
$array .= ")rn?>";
file_put_contents("data.php",$array);
}

public function add_wirte($rs)
{
$array = " $array .= '$class = array'."rn(rn";
foreach($rs as $key=>$value)
{
$array .= "rn";
$array .= ' "'.$key.'" => array'."rn";
$array .= ' ('."rn";
$array .= ' "sortname" => "'.$value["sortname"].'"'.",rn";
$array .= ' "sortlevel" => "'.$value["sortlevel"].'"'."rn";
$array .= ' ),';
}
$array = substr($array,0,-1);
$array .= "rn)rn?>";
file_put_contents("data.php",$array);
}
}


$cat = new cat();
if($_GET["action"] == "add")
{
if(strlen($_POST["sortname"]) <2)
{
echo '';
echo '';
exit;
}
if(file_exists("data.php"))
{
$cat->add_cat($_POST["sortname"],$_POST["sortlevel"]);
echo '';
echo '';
exit;
}
else
{
$cat->wirte($_POST["sortname"],$_POST["sortlevel"]);
echo '';
echo '';
exit;
exit;
}
}

if($_GET["action"] == "tpl")
{
echo '';"rn";
echo ''."rn";
echo '根分类'."rn";
foreach($cat->orders() as $val)
{
echo '';
$clevel = strlen(substr($val['sortlevel'],0,-3));
for($i = 0; $i <$clevel; $i++)
{
echo "-";
}
echo $val['sortname']."rn";
}
echo "rn";
echo ' '."rn";
echo '';
echo "";
exit;
}

foreach($cat->orders() as $value)
{
$level = strlen(substr($value['sortlevel'],0,-3));
for($i = 0; $i <$level; $i++)
{
echo "-";
}
echo $value["sortname"];
echo "
";
}
?>