php+mysql无限级分类程序代码

//$count为分类等级
sort_list($str,$fatherid,$count)
{
$rs = $this->sql->re_datas("select * from sort where father_id = fatherid");
$num = $this->sql->sql_numrows();
$i=0;
$n = 1;
while(isset($rs[$i]))
{
$name = "";
for($n = 1 ; $n < $count ; $n++)
{
$name.="│ ";
}
if($i+1==$num)
{
$name.="└─".$rs[$i][name];
}
else
{
$name.="├─".$rs[$i][name];
}
if($rs[$i][isdir])
{
$str.="".$name."";
}
else
{
$str.=$name";
}
$temp = $count+1;
$str = $this->sort_list($str,$rs[$i][id],$temp);
$i++;
}
return $str;
}

$conn = mysql_connect ( 'localhost', 'root', 'root' );
mysql_select_db ( 'wanggou123', $conn );
mysql_query ( 'set names UTF8' );
$sql = "select id,concat(catpath,'-',id) as abspath,name from category order by abspath";

$query = mysql_query ( $sql );
while ( $row=mysql_fetch_array($query)) {

/**
* 第一种展示方法
*/
/*$space = str_repeat ( ' ', count ( explode ( '-', $row ['abspath'] ) ) - 1 );
echo $space . $row ['name'] . '
';*/
/**
第二种展示方法
*/
$space = str_repeat ( '——', count ( explode ( '-', $row ['abspath'] ) ) - 1 );
$option .= '' . $space . $row ['name'] . '
';
}
echo $option;
exit();
echo '' . $option . '';