thinkphp5使用无限极分类

thinkphp5使用无限极分类的具体代码，供大家参考，具体内容如下

1. 先根据普通递归完成无限极分类

2. 再根据分号的类的level 添加字符，再次存入数组的_name字段，最后按照_name字段输出

  /**    * 获得树状数据    * @param $data 数据    * @param $title    数据库中字段名    * @param string $fieldPri  数据库中主键id    * @param string $fieldPid  数据库中父id    * @return array    */   static public function tree($data, $title, $fieldPri = 'cid', $fieldPid = 'pid')   {    if (!is_array($data) || empty($data))     return array();    $arr = Data::channelList($data);    foreach ($arr as $k => $v) {     $str = "";     if ($v['_level'] > 2) {      for ($i = 1; $i < $v['_level'] - 1; $i++) {       $str .= "│ ";      }     }     if ($v['_level'] != 1) {      $t = $title ? $v[$title] : "";      if (isset($arr[$k + 1]) && $arr[$k + 1]['_level'] >= $arr[$k]['_level']) {       $arr[$k]['_name'] = $str . "├─ " . $v['_html'] . $t;      } else {       $arr[$k]['_name'] = $str . "└─ " . $v['_html'] . $t;      }     } else {      $arr[$k]['_name'] = $v[$title];     }    }    //设置主键为$fieldPri    $data = array();    foreach ($arr as $d) {     $data[$d[$fieldPri]] = $d;    }    return $data;   }

  /**    * 获得所有子栏目    * @param $data 栏目数据    * @param int $pid 操作的栏目    * @param string $html 栏目名前字符    * @param string $fieldPri 表主键    * @param string $fieldPid 父id    * @param int $level 等级    * @return array    */   static public function channelList($data, $pid = 0, $html = " ", $fieldPri = 'cid', $fieldPid = 'pid', $level = 1)   {    $data = self::_channelList($data, $pid, $html, $fieldPri, $fieldPid, $level);    if (empty($data))     return $data;       foreach ($data as $n => $m) {     if ($m['_level'] == 1)      continue;//结束单次循环     $data[$n]['_first'] = false;     $data[$n]['_end'] = false;     if (!isset($data[$n - 1]) || $data[$n - 1]['_level'] != $m['_level']) {      $data[$n]['_first'] = true;      }     if (isset($data[$n + 1]) && $data[$n]['_level'] > $data[$n + 1]['_level']) {      $data[$n]['_end'] = true;     }    }    //更新key为栏目主键    $category=array();    foreach($data as $d){     $category[$d[$fieldPri]]=$d;    }    return $category;   }

  //只供channelList方法使用      /**    * 获得所有子栏目    * @param $data 栏目数据    * @param int $pid 操作的栏目    * @param string $html 栏目名前字符    * @param string $fieldPri 表主键    * @param string $fieldPid 父id    * @param int $level 等级    * @return array    */   static private function _channelList($data, $pid = 0, $html = " ", $fieldPri = 'cid', $fieldPid = 'pid', $level = 1)   {    if (empty($data))     return array();    $arr = array();       foreach ($data as $v) {     $id = $v[$fieldPri];     if ($v[$fieldPid] == $pid) {      $v['_level'] = $level;      $v['_html'] = str_repeat($html, $level - 1);      $arr[] = $v;         $tmp = self::_channelList($data, $id, $html, $fieldPri, $fieldPid, $level + 1);      $arr = array_merge($arr, $tmp);//array_merge把两个数组整合为一个数组     }    }    return $arr;   }