$ret = ''; $arrs = array(array(1,'test1'),              array(2,'test2'),              array(3,'test3'),              array(4,'test4'),              array(5,'test5'),              array(6,'test6'),              array(7,'test7')             ); foreach($arrs as $k=>$arr){     $ret .= $arr[0].",".$arr[1]." n"; } //$ret = @mb_convert_encoding ($ret, 'GBK','UTF-8'); header("Content-Disposition: attachment; filename=xxxx.csv"); header("Content-Type:APPLICATION/OCTET-STREAM"); echo $ret;