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

以上就是PHP如何实现文章分类的详细内容！

查看更多关于PHP如何实现文章分类的详细内容...