無限級分類及生成json數據

第一步,先去數據庫查詢類別數據,然后交給生成json數據的函數處理,代碼如下:

/*生成類別JSON數據*/
    public function wirteJson(){
        $dataInfo = \think\Db::query("select id as v,name as n,pid from think_pro_category");
        $data = $this->getCategoryJson($dataInfo);
        return $data;
    }

第二步,將查詢出來的類別數據重新歸類排序,代碼如下:

/**
 *處理分類數組
**/
function generateTree($items) {
    $tree = array();
    foreach($items as $item){
        if(isset($items[$item['pid']])){
            $items[$item['pid']]['s'][] = &$items[$item['v']];
        }else{
            $tree[] = &$items[$item['v']];
        }
    }
    return $tree;
}

第三步,生成json數據,並返回數據,代碼如下:

/**
     * 功能:無限級類別json數據生成
     * 參數:$data 類別查詢結果集
     * 返回值:$json 遞歸查詢排序后的json數據
     */
    public function getCategoryJson($dataInfo) {
        /*生成json數據*/
        foreach($dataInfo as $category) {
            $tree[$category['v']] = $category;
            $tree[$category['v']]['s'] = array();
        }
        $content = json_encode(generateTree($tree));
        $content = str_replace(',"s":[]', "", $content);
        // for( $i = 0; $i < count($dataInfo); $i++ ) {
        //     $content = str_replace('"'.$dataInfo[$i]['v'].'":', "", $content);
        // }
        //$content = '['.substr($content,1,strlen($content)-2).']';
        //return $content;
        /*寫入文件*/
        //文件存放路徑
        $filePath = $_SERVER['DOCUMENT_ROOT'].DS.'/category/category.json';
        $returnval = file_put_contents($filePath,$content);
        // $fopen = fopen($filePath,'w+');
        // fwrite($fopen,$content);
        // fclose($fopen);
        return $returnval;
    }