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About the implementation of infinite classification and recursion in CI framework

Jun 14, 2018 pm 02:04 PM

ci recursion

CodeIgniter is a lightweight but powerful PHP framework. Based on the MVC design pattern, it provides a rich set of class libraries that are easy to learn, efficient and practical. The following is an introduction to the implementation code of infinite classification recursion of the CI framework. Interested friends can refer to it

What is CI?

CodeIgniter is a lightweight but The powerful PHP framework, based on the MVC design pattern, provides a rich set of class libraries that are easy to learn, efficient and practical.

Let’s take a look at the implementation code of CI framework infinite classification recursion. The specific code is as follows:

//无级分类+递归
public function digui(){
$crr = $this-&gt;db-&gt;get(&#39;category&#39;)-&gt;result_array();
$list[&#39;type&#39;] = $this-&gt;nolimit($crr,0,0);
$this-&gt;load-&gt;view(&#39;list1&#39;,$list);
}
public function nolimit($crr,$p_id,$level){
static $arr = array();
foreach($crr as $v){
if($v[&#39;parent_id&#39;]==$p_id){
$v[&#39;level&#39;] = $level;
$arr[] = $v;
$this-&gt;nolimit($crr,$v[&#39;cat_id&#39;],$level+1);
}
}
return $arr;
}
&lt;td&gt;&lt;?PHP echo str_repeat(&#39;    &#39;,$val[&#39;level&#39;])?&gt;&lt;?php echo $val[&#39;cat_name&#39;]?&gt;&lt;/td&gt;
//获取1级、2级、3级分类
public function sel_child($p_id){
$arr = $this-&gt;sel_son($p_id);
foreach($arr as $k=&gt;$v){
$tmp = $this-&gt;sel_son($v[&#39;cat_id&#39;]);
foreach($tmp as $kk=&gt;$vv){
$tmp2 = $this-&gt;sel_son($vv[&#39;cat_id&#39;]);
$tmp[$kk][&#39;childs&#39;] = $tmp2;
}
$arr[$k][&#39;child&#39;] = $tmp;
}
return $arr;
}
//通过ID获取所有的下级分类
public function sel_son($id){
$this-&gt;db-&gt;where(&quot;parent_id=$id&quot;);
return $this-&gt;db-&gt;get(self::$cate)-&gt;result_array();
}
//渲染展示主页模板
public function lists(){
$p_id = 0;
$brr[&#39;type&#39;] = $this-&gt;Home_model-&gt;sel_child($p_id);
$brr[&#39;list&#39;] = $this-&gt;db-&gt;get(&#39;goods&#39;)-&gt;result_array();
$this-&gt;load-&gt;view(&#39;Home/list.html&#39;,$brr);
}
&lt;?php foreach($type as $v){?&gt;
&lt;li id=&quot;cat_1&quot; class=&quot;&quot;&gt;
&lt;h3&gt;&lt;a href=&quot;&quot;&gt;&lt;?php echo $v[&#39;cat_name&#39;]?&gt;&lt;/a&gt;&lt;/h3&gt;
&lt;?php foreach($v[&#39;child&#39;] as $vv){?&gt;
&lt;dl class=&quot;clearfix&quot;&gt;
&lt;dt&gt;&lt;a href=&quot;&quot;&gt;&lt;?php echo $vv[&#39;cat_name&#39;]?&gt;&lt;/a&gt;&lt;/dt&gt;
&lt;?php foreach($vv[&#39;childs&#39;] as $vvv){?&gt;
&lt;a href=&quot;&quot;&gt;&lt;?php echo $vvv[&#39;cat_name&#39;]?&gt;&lt;/a&gt;
&lt;?php }?&gt;
&lt;/dl&gt;
&lt;?php }?&gt;
&lt;/li&gt;
&lt;?php }?&gt;

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