面包屑导航

问题描述

| 您能帮我得到这份面包屑的导航工作吗？我的php不好。我还在学习。 这是我在mysql中的猫

cats_id   cats_position   cats_parentid 

1            1>                0
2            1>2>              1
3            3>                0
4            1>2>4>            2

我尝试过类似的方法，但这不是正确的方法。你能告诉我正确的方法吗？

$pieces = explode(\">\",$position);

if ($pieces[0] != \"\")
{

 $result = mysql_query(\"SELECT * FROM cats
 WHERE cats_id=\'$pieces[0]\'\");
 while($row = mysql_fetch_array($result))
   {
$piecesid0 = $row[\'cats_id\'];
$piecesname0 = $row[\'cats_name\'];
$piecesposition0 = $row[\'cats_position\'];
   }
}
if ($pieces[1] != \"\")
{
 $result = mysql_query(\"SELECT * FROM cats
 WHERE cats_id=\'$pieces[1]\'\");
 while($row = mysql_fetch_array($result))
   {
$piecesid1 = $row[\'cats_id\'];
$piecesname1 = $row[\'cats_name\'];
$piecesposition1 = $row[\'cats_position\'];
   }
}
if ($pieces[2] != \"\")
{
 $result = mysql_query(\"SELECT * FROM cats
 WHERE cats_id=\'$pieces[2]\'\");
 while($row = mysql_fetch_array($result))
   {
$piecesid2 = $row[\'cats_id\'];
$piecesname2 = $row[\'cats_name\'];
$piecesposition2 = $row[\'cats_position\'];
   }
}
if ($pieces[3] != \"\")
{
 $result = mysql_query(\"SELECT * FROM cats
 WHERE cats_id=\'$pieces[3]\'\");
 while($row = mysql_fetch_array($result))
   {
$piecesid3 = $row[\'cats_id\'];
$piecesname3 = $row[\'cats_name\'];
$piecesposition3 = $row[\'cats_position\'];
   }
}
?>
<a href=\"index.php\">Index</a> > 

<a href=\"cats.php?cat=<?=$piecesid0;?>&parent=0&position=<?=$piecesposition0;?>\"><?=$piecesname0;?></a>

<?
If ($piecesid1 != \"\")
{
?>
> <a href=\"cats.php?cat=<?=$piecesid1;?>&parent=<?=$piecesid0;?>&position=<?=$piecesposition1;?>\"><?=$piecesname1;?></a>
<?
}
?>
<?
If ($piecesid2 != \"\")
{
?>
> <a href=\"cats.php?cat=<?=$piecesid2;?>&parent=<?=$piecesid1;?>&position=<?=$piecesposition2;?>\"><?=$piecesname2;?></a>
<?
}
?>
<?
If ($piecesid3 != \"\")
{
?>
> <a href=\"cats.php?cat=<?=$piecesid3;?>&parent=<?=$piecesid2;?>&position=<?=$piecesposition3;?>\"><?=$piecesname3;?></a>
<?
}
?>

    

解决方法

        在这里查看嵌套的set模型： http://mikehillyer.com/articles/managing-hierarchical-data-in-mysql/ 这就是CakePHP实施Tree行为的方式，这是我用于面包屑的方式。他们添加了parent_id列作为嵌套集的增强版本。 如果太重，则可以使用邻接表模型：http://kod34fr33.wordpress.com/2008/05/06/adjacency-list-tree-on-mysql/