實現規格：一個新聞無線分類系統最終實現的效果如下
ㅣㅡㅡ體育新聞
ㅣㅡㅡㅡㅡ足球新聞
ㅣㅡㅡㅡㅡ籃球新聞
ㅣㅡㅡㅡㅡ其他體育
ㅣㅡㅡ娛樂新聞
ㅣㅡㅡㅡㅡ電影
ㅣㅡㅡㅡㅡ音樂
ㅣㅡㅡ科技新聞
ㅣㅡㅡㅡㅡ智慧手機
ㅣㅡㅡㅡㅡㅡㅡ小米手機
ㅣㅡㅡㅡㅡㅡㅡ華為手機

laravel Model層實現獲取分類資訊（使用遞迴）

<?php

namespace App\Model;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Collection;

class
 
 Category extends Model
{
    protected $table = 'category';
    protected $primaryKey='CategoryID';
    public $timestamps=false;

    //使用遞迴獲取分類 （正式函式）
    public function getCategory($sourceItems, $targetItems, $pid=0){
        foreach ($sourceItems as $k => $v) {
            if($v->pid == $pid
 
){
                $targetItems[] = $v;
                $this->getCategory($sourceItems, $targetItems, $v->CateID);
            }
        }
    }

    //使用遞迴獲取分類資訊測試函式 （測試正式函式）
    public function getCategoryTest($sourceItems, $targetItems, $pid=0, $str='ㅣ'){
        $str .= 'ㅡㅡ';
        foreach
 
 ($sourceItems as $k => $v) {
            if($v->pid == $pid){
                $v->CateName = $str.$v->CateName;
                $targetItems[] = $v;
                $this->getCategoryTest($sourceItems, $targetItems, $v->CateID, $str);
            }
        }
    }

    //使用遞迴獲取分類資訊 （正式函式）
    public function getCategoryInfo(){
        $sourceItems = $this->get();
        $targetItems = new Collection;
        $this->getCategory($sourceItems, $targetItems, 0);
        return $targetItems;
    }

    //測試函式 （測試正式函式）
    public function getCategoryInfoTest(){
        $sourceItems = $this->get();
        $targetItems = new Collection;
        $this->getCategoryTest($sourceItems, $targetItems);
        return $targetItems;
    }

}

laravel ctroller層實現測試效果

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Http\Requests;
use Illuminate\Support\Facades\Input;
use Illuminate\Support\Facades\Validator;
use App\Model\Category;
use Illuminate\Database\Eloquent\Collection;
use DB;

class CategoryCtroller extends Controller
{
    public function index(){
        $category = new Category;
        $items = $category->getCategoryInfoTest();
        foreach ($items as $key => $item) {
            dump($item->CateName);
        }

    }
}

訪問相關的控制器就可看見要實現的無限分類的效果