PHP Category class library unlimited categories

Category class library unlimited classification

The following is the method of using this class library

include("Common/Category.class.php");
$Category = new Category("ArticleCategory",array('id','pid','name','fullname'));
$categoryList = $Category->getList();

1. Include the class library through include

2. Instantiate the class through new

3. Call the getList() method to obtain all classification lists

4. Return: all classification lists , you can display the reference by getting fullname.

The effect is as shown:

The following is the complete source code of the class library:

<?php
 
/**
 * 类功能：php无限分类
 * author：252588119@qq.com
 * 使用方法见：http://liqingbo.cn/blog-434.html
 */
class Category {
 
    private $model;                                                           //分类的数据表模型
    private $rawList = array();                                              //原始的分类数据
    private $formatList = array();                                           //格式化后的分类
    private $error = "";                                                      //错误信息
    private $icon = array(&#39;  │&#39;, &#39;  ├ &#39;, &#39;  └ &#39;);  //格式化的字符
    private $fields = array();                                               //字段映射，分类id，上级分类pid,分类名称name,格式化后分类名称fullname
 
    /**
     * 构造函数，对象初始化
     * @param array,object  $model      数组或对象，基于TP3.0的数据表模型名称,若不采用TP，可传递空值。
     * @param array         $field      字段映射，分类cid，上级分类pid,分类名称,格式化后分类名称fullname
     */
 
    public function __construct($model = &#39;&#39;, $fields = array()) {
        if (is_string($model) && (!empty($model))) {
            if (!$this->model = D($model))
                $this->error = $model . "模型不存在！";
        }
        if (is_object($model))
            $this->model = &$model;
 
        $this->fields[&#39;cid&#39;] = $fields[&#39;0&#39;] ? $fields[&#39;0&#39;] : &#39;id&#39;;
        $this->fields[&#39;pid&#39;] = $fields[&#39;1&#39;] ? $fields[&#39;1&#39;] : &#39;pid&#39;;
        $this->fields[&#39;name&#39;] = $fields[&#39;2&#39;] ? $fields[&#39;2&#39;] : &#39;name&#39;;
        $this->fields[&#39;fullname&#39;] = $fields[&#39;3&#39;] ? $fields[&#39;3&#39;] : &#39;fullname&#39;;
    }
 
    /**
     * 获取分类信息数据
     * @param array,string  $condition  查询条件
     * @param string        $orderby    排序
     */
    private function _findAllCat($condition, $orderby = NuLL) {
        $this->rawList = $this->model->where($condition)->order($orderby)->select();
    }
 
    /**
     * 返回给定上级分类$pid的所有同一级子分类
     * @param   int     $pid    传入要查询的pid
     * @return  array           返回结构信息
     */
    public function getChild($pid) {
        $childs = array();
        foreach ($this->rawList as $Category) {
            if ($Category[$this->fields[&#39;pid&#39;]] == $pid){
                $childs[] = $Category;
            }
        }
        return $childs;
    }
 
    /**
     * 递归格式化分类前的字符
     * @param   int     $cid    分类cid
     * @param   string  $space
     */
    private function _searchList($cid = 0, $space = "") {
        $childs = $this->getChild($cid);
        //下级分类的数组
        //如果没下级分类，结束递归
        if (!($n = count($childs))){
            return;
        }
        $m = 1;
        //循环所有的下级分类
        for ($i = 0; $i < $n; $i++) {
            $pre = "";
            $pad = "";
            if ($n == $m) {
                $pre = $this->icon[2];
            } else {
                $pre = $this->icon[1];
                $pad = $space ? $this->icon[0] : "";
            }
            $childs[$i][$this->fields[&#39;fullname&#39;]] = ($space ? $space . $pre : "") . $childs[$i][$this->fields[&#39;name&#39;]];
            $this->formatList[] = $childs[$i];
            $this->_searchList($childs[$i][$this->fields[&#39;cid&#39;]], $space . $pad . "  "); //递归下一级分类
            $m++;
        }
    }
 
    /**
     * 不采用数据模型时，可以从外部传递数据，得到递归格式化分类
     * @param   array,string     $condition    条件
     * @param   int              $cid          起始分类
     * @param   string           $orderby      排序
     * @return  array           返回结构信息
     */
    public function getList($condition = NuLL, $cid = 0, $orderby = NuLL) {
        unset($this->rawList, $this->formatList);
        $this->_findAllCat($condition, $orderby);
        $this->_searchList($cid);
        return $this->formatList;
    }
 
    /**
     * 获取结构
     * @param   array            $data         二维数组数据
     * @param   int              $cid          起始分类
     * @return  array           递归格式化分类数组
     */
    public function getTree($data, $cid = 0) {
        unset($this->rawList, $this->formatList);
        $this->rawList = $data;
        $this->_searchList($cid);
        return $this->formatList;
    }
 
    /**
     * 获取错误信息
     * @return  string           错误信息字符串
     */
    public function getError() {
        return $this->error;
    }
 
    /**
     * 检查分类参数$cid,是否为空
     * @param   int              $cid          起始分类
     * @return  boolean           递归格式化分类数组
     */
    private function _checkCatID($cid) {
        if (intval($cid)) {
            return true;
        } else {
            $this->error = "参数分类ID为空或者无效！";
            return false;
        }
    }
 
    /**
     * 检查分类参数$cid,是否为空
     * @param   int         $cid        分类cid
     */
    private function _searchPath($cid) {
        //检查参数
        if (!$this->_checkCatID($cid))
            return false;
        $rs = $this->model->find($cid);                                        //初始化对象，查找上级Id；
        $this->formatList[] = $rs;                                            //保存结果
        $this->_searchPath($rs[$this->fields[&#39;pid&#39;]]);
    }
 
    /**
     * 查询给定分类cid的路径
     * @param   int         $cid        分类cid
     * @return  array                   数组
     */
    public function getPath($cid) {
        unset($this->rawList, $this->formatList);
        $this->_searchPath($cid);                                               //查询分类路径
        return array_reverse($this->formatList);
    }
 
    /**
     * 添加分类
     * @param   array         $data        一维数组，要添加的数据，$data需要包含上级分类ID。
     * @return  boolean                    添加成功，返回相应的分类ID,添加失败，返回FALSE；
     */
    public function add($data) {
        if (empty($data))
            return false;
        return $this->model->data($data)->add();
    }
 
    /**
     * 修改分类
     * @param   array         $data     一维数组，$data需要包含要修改的分类cid。
     * @return  boolean                 组修改成功，返回相应的分类ID,修改失败，返回FALSE；
     */
    public function edit($data) {
        if (empty($data))
            return false;
        return $this->model->data($data)->save();
    }
 
    /**
     * 删除分类
     * @param   int         $cid        分类cid
     * @return  boolean                 删除成功，返回相应的分类ID,删除失败，返回FALSE
     */
    public function del($cid) {
        $cid = intval($cid);
        if (empty($cid))
            return false;
        $conditon[$this->fields[&#39;cid&#39;]] = $cid;
        return $this->model->where($conditon)->delete();
    }
 
    /**
     * 删除分类
     * @param   int         $cid        分类cid
     * @return  boolean                 删除成功，返回相应的分类ID及所有子ID 数组,返回FALSE
     */
    public function getIdArr($cid){
         $cid = !empty($cid) ? intval($cid) : 0;
         if (empty($cid)) return false;
         $list = $this->getList($condition = NuLL,$cid, $orderby = NuLL);
         foreach($list as $val){
             $idArr[] = $val[$this->fields[&#39;cid&#39;]];
         }
         unset($list);
         $idArr[] = $cid;
         return $idArr;
    }
 
}
?>

The demo contains a file folder, three files. The Helper folder contains unlimited classification processing classes. The folder is placed in the Application/Common/ directory. CategoryController.class.php is the controller file. It is used to demonstrate how to use unlimited classification processing classes. When using unlimited classifications in the controller, remember to introduce use first. Common\Helper\Category;category_add.html is a view file used to demonstrate how to call unlimited categories in the template.

go_category.sql is a classification table database file, for reference only. The core fields of the classification table are id: column id, title: column name, parent_id: parent column id, is_show: whether to display in the foreground, sort: frontend sorting.

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