PHP实现的无限分类类库定义与用法示例

本文实例讲述了PHP实现的无限分类类库定义与用法。分享给大家供大家参考，具体如下：

class Category
{
  //分类的数据表模型
  private $model;
  //原始的分类数据
  private $rawList = array();
  //格式化后的分类
  private $formatList = array();
  //错误信息
  private $error = "";
  //格式化的字符
  private $icon = array(' │', ' ├ ', ' └ ');
  //字段映射，分类id，上级分类pid,分类名称title,格式化后分类名称fulltitle
  private $field = array();
  
  public function __construct($model = '', $field = array())
  {
    //判断参数类型
    if (is_string($model) && (!empty($model))) {
      if (!$this->model = D($model)) //注意这里的D函数需要TP支持
 $this->error = $model . "模型不存在！";
    }
    if (is_object($model)) {
      $this->model =& $model;
    }
    $this->field['id']    = $field['0'] ? $field['0'] : 'id';
    $this->field['pid']    = $field['1'] ? $field['1'] : 'pid';
    $this->field['title']   = $field['2'] ? $field['2'] : 'title';
    $this->field['fulltitle'] = $field['3'] ? $field['3'] : 'fulltitle';
  }
  
  private function _findAllCat($condition, $orderby = NULL)
  {
    if (empty($orderby)) {
      $this->rawList = $this->model->where($condition)->findAll();
    } else {
      $this->rawList = $this->model->where($condition)->order($orderby)->findAll();
    }
  }
  
  public function getChild($pid)
  {
    $childs = array();
    foreach ($this->rawList as $Category) {
      if ($Category[$this->field['pid']] == $pid)
 $childs[] = $Category;
    }
    return $childs;
  }
  
  private function _searchList($CatID = 0, $space = "")
  {
    //下级分类的数组
    $childs = $this->getChild($CatID);
    //如果没下级分类，结束递归
    if (!($n = count($childs)))
      return;
    $cnt = 1;
    //循环所有的下级分类
    for ($i = 0; $i < $n; $i++) {
      $pre = "";
      $pad = "";
      if ($n == $cnt) {
 $pre = $this->icon[2];
      } else {
 $pre = $this->icon[1];
 $pad = $space ? $this->icon[0] : "";
      }
      $childs[$i][$this->field['fulltitle']] = ($space ? $space . $pre : "") . $childs[$i][$this->field['title']];
      $this->formatList[]   = $childs[$i];
      //递归下一级分类
      $this->_searchList($childs[$i][$this->field['id']], $space . $pad . " ");
      $cnt++;
    }
  }
  
  public function getList($condition = NULL, $CatID = 0, $orderby = NULL)
  {
    unset($this->rawList);
    unset($this->formatList);
    $this->_findAllCat($condition, $orderby, $orderby);
    $this->_searchList($CatID);
    return $this->formatList;
  }
  
  public function getTree($data, $CatID = 0)
  {
    unset($this->rawList);
    unset($this->formatList);
    $this->rawList = $data;
    $this->_searchList($CatID);
    return $this->formatList;
  }
  
  public function getError()
  {
    return $this->error;
  }
  
  private function _checkCatID($CatID)
  {
    if (intval($CatID)) {
      return true;
    } else {
      $this->error = "参数分类ID为空或者无效！";
      return false;
    }
  }
  
  private function _searchPath($CatID)
  {
    //检查参数
    if (!$this->_checkCatID($CatID))
      return false;
    //初始化对象，查找上级Id；
    $rs = $this->model->find($CatID);
    //保存结果
    $this->formatList[] = $rs;
    $this->_searchPath($rs[$this->field['pid']]);
  }
  
  public function getPath($CatID)
  {
    unset($this->rawList);
    unset($this->formatList);
    //查询分类路径
    $this->_searchPath($CatID);
    return array_reverse($this->formatList);
  }
  
  
  public function add($data)
  {
    if (empty($data))
      return false;
    return $this->model->data($data)->add();
  }
  
  public function edit($data)
  {
    if (empty($data))
      return false;
    return $this->model->data($data)->save();
  }
  
  public function del($CatID)
  {
    $CatID = intval($CatID);
    if (empty($CatID))
      return false;
    $conditon[$this->field['id']] = $CatID;
    return $this->model->where($conditon)->delete();
  }
}

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