PHP 数组按照分类来组装，可用于无限级分类

我就是我 2022-04-11 11:48 236阅读 0赞

html页面

<form class="form form-horizontal" class="layui-form" id="form" method="post" action="{:\\think\\Request::instance()->baseUrl()}">
            <input type="hidden" name="__token__" value="{$Request.token}" />
            <input type="hidden" name="cid" value="{$info.cid}"/>
        <div class="layui-tab">
            <div class="layui-tab-content">
                <div class="layui-tab-item layui-show">
                    <div class="row cl">
                        <label class="form-label col-xs-3 col-sm-3"><span class="c-red">*</span>分类：</label>
                        <div class="formControls col-xs-3 col-sm-3">
                            <select name="pid" class="selectpicker" title="-选择或搜索-" id="hz" datatype="*">
                                <option value="0" selected>顶级分类</option>
                                {foreach name="list" item="vi"}
                                    <option value="{$vi.cid},{$vi.leval}" {if $info.pid eq $vi.cid} selected {/if} >{$vi.cname_str}</option>
                                {/foreach}
                            </select>
                        </div>
                    </div>
                    <div class="row cl">
                        <label class="form-label col-xs-3 col-sm-3"><span class="c-red">*</span>名称：</label>
                        <div class="formControls col-xs-3 col-sm-3">
                            <input type="text" class="input-text" value="{$info.cname ?? ''}" name="cname" datatype="*">
                        </div>
                        <div class="col-xs-3 col-sm-3"></div>
                    </div>
                
                    <div class="row cl">
                        <label class="form-label col-xs-3 col-sm-3">描述：</label>
                        <div class="formControls col-xs-6 col-sm-6">
                            <textarea class="textarea" name="cdesc" onKeyUp="textarealength(this,500)">{$info.cdesc ?? ''}</textarea>
                            <p class="textarea-numberbar"><em class="textarea-length">0</em>/500</p>
                        </div>
                        <div class="col-xs-3 col-sm-3"></div>
                    </div>
                    <div class="row cl">
                            <div class="col-xs-8 col-sm-9 col-xs-offset-4 col-sm-offset-3">
                                <button type="submit" class="btn btn-primary radius">  提交  </button>
                                <button type="button" class="btn btn-default radius ml-20" onClick="layer_close();">  取消  </button>
                            </div>
                        </div>
                </div>
            </div>
        </div>
    
        </form>

CREATE TABLE IF NOT EXISTS `w_cate` (
      `cid` varchar(45) NOT NULL COMMENT 'ID',
      `cname` varchar(45) DEFAULT NULL COMMENT '名称',
      `pid` varchar(45) DEFAULT '0' COMMENT '上级ID',
      `leval` smallint(10) DEFAULT '1',
      `cdesc` varchar(255) DEFAULT NULL COMMENT '描述',
      PRIMARY KEY (`cid`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='分类表';

保存数据

public function savaData($data){
            $cid_arr = [];
            $cid_arr = explode(',',$data['pid']);
            $map = [];
            if (!empty($data['cid'])){
                $data['leval'] = $cid_arr[1];
                $map['cid'] = $data['cid'];
            }
            $data['leval'] = $cid_arr[1]+1;
    
            $data['pid'] = $cid_arr[0];
            if (false===$this->validate(true)->save($data,$map)) {
                $this->error = $this->getError();
                return false;
            }
        }

数组分类显示时 添加缩进和图标字符

public function getList($map=[],$num=15,$order=''){
            $data = $this->where($map)->order('pid')->select();
            foreach($data as $k=>$v){
                $str = "";
                for($i=1;$i<$v['leval'];$i++){
                    $str .= "    ";
                }
                $str .= "⌊ ";
                $data[$k]['padd'] = 20*$v['leval'];
                $data[$k]['cname_str'] =  $str.$v['cname'];
            }
            return $data;
        }

数组根据分类ID分组

public function getGroupList($data,$cid,$leval){
            static $subs=array();
            foreach($data as $v){
                $v['leval']=$leval;
                if($v['pid']=="$cid"){
                    $subs[]=$v->toArray();
                    self::getGroupList($data,$v['cid'],$leval+1);
                }
            }
            return $subs;
        }

/**
         * 返回某个分类下的所有子分类IDs和自身ID.
         *
         * @param string $cid
         */
        public function getChildIds($cid = '0')
        {
            $data = $this->getList();
    
            $ids = self::returnChildrenIds($data, $cid);
            array_push($ids, "$cid");
    
            return  $ids;
        }
    
        public function returnChildrenIds($data, $cid = '0')
        {
            static $arr = [];
            if (empty($cid)) {
                $cid = '0';
            }
    
            foreach ($data as $v) {
                if ($v['pid'] == "$cid" and !in_array($v['cid'], $arr)) {
                    array_push($arr, $v['cid']);
                    self::returnChildrenIds($data, $v['cid']);
                }
            }
    
            return $arr;
        }