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");
}

}