/**
*下载csv数据
*@param $array数据
*@param $file
*/
function down_csv($array,$file){
set_time_limit(0);
$str='';
foreach ($array as $k3=>$v3){
$string='';
foreach ($v3 as $k=>$v){
$string.=$string==""?''.$v:','.''.$v;
}
$str.= "$string
";
}
$str=mb_convert_encoding($str, "GBK", "UTF-8");
$re=file_put_contents('./'.$file,"$str");
header("Content-type:application/vnd.ms-execl;charset=gb2312");
header('location:/'.$file);exit;
}