PHP根据分类分别生成js缓存文件

//生成分类 缓存    $sql = "SELECT catid FROM `category`";    $r = $db->query($sql);    $row=$db->fetchALL($r);    for ($i=0; $i <count($row) ;$i++) {         $v = $row[$i]['catid'];        $c_sql = "SELECT id,catid,name FROM `address_list` where catid = ".$v;        $c_r = $db -> query($c_sql);        $c_rs = $db->fetchAll($c_r);        //循环文件内容        for ($j=0; $j <count($c_rs) ; $j++) {             $cons[$i].= '{"id":"'.$c_rs[$j][id].'","catid":"'.$c_rs[$j][catid].'","label":"'.$c_rs[$j][name].'"},';        }        $content = "var colors = [".$cons[$i]."]";        //生成文件        $fdir = "./caches/";        $fname = "cache_category_".$v.".js";        $dir = $fdir.$fname;        $fp =fopen($dir,"w+");        if(false!=$fp){            fwrite($fp,$content,strlen($content));            fclose($fp);            echo success('生成成功',"?action=address");        }    }