php+mysql实现无限级分类 | 树型显示分类关系
无限级分类,主要是通过储存上级分类的id以及分类路径来实现。由于数据的结构简单,所以要将分类的关系由树状显示,我只能想到用递归的方式给于实现。
无限级分类,主要是通过储存上级分类的id以及分类路径来实现。由于数据的结构简单,所以要将分类的关系由树状显示,我只能想到用递归的方式给于实现,下面是分类数据表结构和自己写的一个树状显示函数,有什么不妥的地方希望大家能指出。
表结构:id字段为分类标识,name字段为分类名,father_id字段为所属父分类的id,path字段为分类路径(储存该分类祖先的集合),isdir判断是否是目录(1为是,0为否)。
显示函数:
复制代码 代码如下:
//$count为分类等级
sort_list($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 {
$name.="│ ";
}
if($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 $str;
}
其中$this->sql对象为sql操作类对象,re_datas()函数返回查到的数组,sql_numrows()函数返回查询到的数目
调用方法:$sort_list = sort_list($sort_list,0,1);
以上为个人思想,还望大家多多指点

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