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thinkphp implements unlimited classification (using recursion)_javascript skills

WBOYOriginal: 2016-05-16 15:24:352519browse

The example in this article shares with you the detailed code of thinkphp to implement infinite classification. I hope it will inspire everyone to learn infinite classification.

Database: test
Data table: (tp_category):

Common/conf/config.php

'DB_CONFIG2' => array(
 'db_type' => 'mysql',
 'db_user' => 'root',
 'db_pwd' => '',
 'db_host' => 'localhost',
 'db_port' => '3306',
 'db_name' => 'test',
 'DB_PREFIX' => 'tp_', // 数据库表前缀
 'DB_CHARSET'=> 'utf8', // 字符集
 'DB_DEBUG' => TRUE, // 数据库调试模式 开启后可以记录SQL日志 3.2.3新增
),

Common/function.php traverse function loop

/*
 * 递归遍历
 * @param $data array
 * @param $id int
 * return array
 * */
function recursion($data, $id=0) {
 $list = array();
 foreach($data as $v) {
 if($v['pid'] == $id) {
 $v['son'] = recursion($data, $v['id']);
 if(empty($v['son'])) {
 unset($v['son']);
 }
 array_push($list, $v);
 }
 }
 return $list;
}

Controller/IndexController.class.php

public function test() {
 $category = M('category', '', C('DB_CONFIG2'))->select();
 $result = loop($category);
 var_dump($result);
 $this->assign('list', $result);
 $this->display();
}

Output in the template (View/Index/test.html) (only supports level 2 classification. If you want to display all, it is recommended to convert the array into JSON format first, and then request through AJAX and generate JS)

<ul>
 <volist name="list" id="vo">
 <li>
 {$vo.category}
 <notempty name="vo['children']">
 <ul>
  <volist name="vo['children']" id="cate">
  <li>{$cate.category}</li>
  </volist>
 </ul>
 </notempty>
 </li>
 </volist>
</ul>

Follow-up (ajax request, recursively display all categories):

Method Controller/IndexController.class.php

public function test() {
 $this->display();
}

public function resultCategory() {
 $category = M('category', '', C('DB_CONFIG2'))->select();
 $result = loop($category);
 $this->ajaxReturn(array('data'=>$result,'status'=>'1','info'=>'获取列表成功'));
}

Template View/Index/test.html

<!DOCTYPE html>
<html>
<head lang="en">
 <meta charset="UTF-8">
 <title>分类测试</title>
 <script src="__PUBLIC__/js/jquery.min.js"></script>
</head>
<body>
<ul id="menu"></ul>

<script>
 $(function() {

 // 递归列表函数
 function recursion(selector,data)
 {
 if(!data) return false;

 for(var i=0;i<data.length;i++)
 {
 var li=$('<li>'+data[i]['category']+'</li>');

 if(data[i]['children'] && data[i]['children'].length>0)
 {
  var ul=$('<ul></ul>');
  recursion(ul,data[i]['children']);
  li.append(ul);
 }

 selector.append(li);
 }
 }

 // ajax请求 用$.post() 会更方便
 $.ajax({
 url: "{:U('resultCategory')}",
 type: 'post',
 dataType: 'json',
 error: function(res) {
 console.log(res);
 },
 success: function(res) {
 recursion($('#menu'),res['data']);

 console.log(res['data']);
 }
 });
 });
</script>

</body>
</html>

Another infinite classification:

/**
 * 无限极分类
 * @param [type] $cate [description]
 * @param integer $pid [description]
 * @param integer $level [description]
 * @param string $html [description]
 * @return [type] [description]
 */
function sortOut($cate,$pid=0,$level=0,$html='--'){
 $tree = array();
 foreach($cate as $v){
 if($v['pid'] == $pid){
 $v['level'] = $level + 1;
 $v['html'] = str_repeat($html, $level);
 $tree[] = $v;
 $tree = array_merge($tree, sortOut($cate,$v['id'],$level+1,$html));
 }
 }
 return $tree;
}

JS recursion (special):

This function is equivalent to implementing PHP’s str_repeat function

/* 字符串重复函数 */
if(!String.str_out_times) {
 String.prototype.str_out_times = function(l) {
 return new Array(l+1).join(this);
 }
}

// 定位到当前选择
function recursion(selector, data, j, pid) {
 var space = '　┠　';
 if(!data) return false;
 $.each(data, function(i, item) {
 var opt = $('<option value="'+item.id+'">'+space.str_out_times(j)+item.name+'</option>');selector.append(opt);
 if(item.son && (item.son).length>0) {
 recursion(selector, item.son, ++j);
 j=0; 
 }
 });

 // 当前是哪个分类
 selector.find('option').each(function() {
 if($(this).val() == pid) {
 $(this).attr('selected', 'selected');
 }
 });
}

Why j=0. Because the execution order feels different from php, it is loaded from top to bottom. .

ajax request data:

$('.btn-edit').click(function() {
 var id = $(this).data('id');
 $.post("{:U('Article/editArticle')}", {id: id}, function(res) {

 // 分类
 $('[name="pid"]').html('');
 recursion($('[name="pid"]'), res.sort, 0, res.pid);

 $('[name="id"]').val(res.id);
 $('[name="title"]').val(res.title);
 $('[name="summary"]').val(res.summary);
 $('#thumbnailImg').attr('src', "__UPLOAD__"+'/thumbnail/'+res.thumbnail);
 ue.setContent(res.content);

 $('#modal-edit').modal('show');
 });
});

The above is how thinkphp implements unlimited classification. I hope it will be helpful to everyone's learning.

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