PHP如何实现文章分类

本篇文章给大家介绍一下用PHP实现文章分类的方法。有一定的参考价值，有需要的朋友可以参考一下，希望对大家有所帮助。

文章分类：同一个新闻 属于 多个菜单项 。比如某新闻既属于校园新闻又属于机构设置，那么点开校园新闻菜单项可以看到这篇文章，点开机构设置也可以看到这篇文章。

两个数据库 type放菜单项 每个菜单项的id唯一。dynamics放文章，文章的tag可以是多个type中的id

public function column($p=1){         $school_dynamicsModel = D('school_dynamics');         $school_typeModel =D('school_type');         $photoModel =D('photo');         $pid = isset($_REQUEST['pid']) ? $_REQUEST['pid'] : false;         $p = intval($p) > 0 ? $p : 1;         $pagesize = 20;         $offset = $pagesize * ($p - 1);                  $count = $school_dynamicsModel->where("tag like '%' '$pid' '%' and is_delete = 0")->count();         $list_school = $school_dynamicsModel->where("tag like '%' '$pid' '%' and is_delete = 0")->order('time desc ')->limit($offset . ',' . $pagesize)->select();         $list = array();          foreach ($list_school as $p) {             if ($p['release_date']) {                 $p['time'] = $p['release_date'];             }             else {                 $p['time'] = date('Y-m-d H:i:s', $p['time']);             }             $list[] = $p;         }                   $this->assign('list',$list);         $this->assign('page', $page);         $this->display();     }

然后在页面上循环输出

 <p class="items-content">     <ul class="article">          <volist name="list" id="val">               <li>                   <a href="/home/index/column_form.html?id={$val.id} ">                       <span>{$val.title}</span><strong>{$val.time}</strong>                    </a>                </li>           </volist>       </ul>        <p class="pages">           {$page}         </p> </p>

当你点击页面上的修改或者新增或者修改时，input把tag中的对应的菜单项读出来

 public function edit($aid = 0){         $aid = intval($aid);         $school_dynamicsModel = D('school_dynamics');         $item = $school_dynamicsModel->where("id='$aid'")->find();         $conditions=$item['tag'];         $character_string=explode(',',$conditions);                  for($cycle=0;$cycle<count($character_string);$cycle++) { 	        $record = D('school_type')->where("id ='$character_string[$cycle]'")->find(); 	        $recordtag[]=$record['title'];         }                  $tag=implode(',',$recordtag); 	    $item['tag']= $tag; 	             if (!$item) {             $this->error('参数错误！');         }                  $option = M('school_type')->order('sort ASC')->select();         $option = $this->getMenu($option);         $this->assign('option', $option); 	    $this->assign('tag', $tag);         $this->assign('item', $item);         $this->display('form');     }      public function update(){     	 		    $id = isset($_REQUEST['id']) ? $_REQUEST['id'] : false;                              $data['tag'] = $_POST['titietag'];  		    $tag_str = $data['tag']; 		    $array_tag = explode(',',$tag_str); 			 		    for ($cyclic_variable = 0; $cyclic_variable < count($array_tag);                                       $cyclic_variable++) { 			 			    			    $result = D('school_type')->where("title='$array_tag[$cyclic_variable]'")->find();  			    $record_id[] = $result['id']; 			    		    } 		    $char = implode(',', $record_id); 	    		    $data['tag'] = $char;               		    if ($id) { 			    D('school_dynamics')->data($data)->where('id=' . $id)->save(); 			    addlog('编辑内容，ID：' . $id); 			    $this->success('恭喜！内容编辑成功！', U('/qwadmin/homepage/index')); 		    } else {  			    $result = D('school_dynamics')->data($data)->add(); 			    if ($result) { 				    addlog('新增内容，ID：' . $result['id']); 				    $this->success('恭喜！内容新增成功！', U('/qwadmin/homepage/index')); 			    } else { 				    $this->error('抱歉，未知错误！'); 			    } 		    } 	    }

网页代码

                              <div class="form-group">                                 <label class="col-sm-1 control-label no-padding-right" for="form-field-1">                                     文章类目： </label>                                 <div class="col-sm-9">                                     <select id="xinzen" name="xinzen" class="rcol-xs-10 col-sm-5">                                           <volist name="option" id="v">                                             <option value="{$v.id}"                                               >{$v['title']}</option>                                             <volist name="v.children" id="vv">                                                 <option value="{$vv.id}"                                                   >{$vv['title']}</option>                                             </volist>                                         </volist>                                     </select>                                       <span class="help-inline col-xs-12 col-sm-7">                                           <span class="middle">                                               <input type="button" value="新增" onclick="toTag()">                                           </span>                                    </span>                                 </div>                             </div>   <script>  function toTag() {        var originally_input=$("#titletag").val();      $("#titletag").val("");      var add_new=$("#xinzen option:selected").text();        if (originally_input.indexOf(add_new, 0) == -1) {          if(originally_input==''){           originally_input = add_new;      }else{          originally_input += ',' + add_new;       }       $("#titletag").val(originally_input);        } else {             $("#titletag").val(originally_input);        }    }                                </script>

推荐学习：php视频教程