php csv文件输出

set_time_limit(0);
header('Content-Type: application/vnd.ms-excel');
header("Content-Disposition: attachment;filename=进货单模板.csv");
header('Cache-Control: max-age=0');
$title_arr = array(
    'SKU码','成本价',"入库数量","商品成色(1-10整数范围内)"
);
foreach ($title_arr as $k => $v) {
    $title_arr[$k] = iconv('utf-8', 'GB18030', $v);
}
echo "\"".implode("\",\"",$title_arr)."\"\r\n";