参考网址： 

php对csv文件的常用操作集合 

http://blog.xhbin.com/archives/748 

1，下载CSV格式文档 

唯一需要特别注意的是编码。 

1 
     

2，生成.csv文件（不下载） 

1 $action = $_GET['action']; 2 if ($action=='make'){ 3  $fp = fopen("csv.csv","a"); //打开csv文件，如果不存在则创建 4  $data_arr1 = array("10001","10002","10003","10004","公司"); //第一行数据 5  $data_arr2 = array("20001","20002","20003","20004","中午"); //第二行数据 6  $data_str1 = implode(",",$data_arr1); //用 ' 分割成字符串 7  $data_str2 = implode(",",$data_arr2); //用 ' 分割成字符串 8  $data_str = $data_str1."\r\n".$data_str2."\r\n"; //加入换行符 9  10  fwrite($fp,iconv('UTF-8','GB2312',$data_str)); //写入数据11  fclose($fp); //关闭文件句柄12  echo "生成成功";13 }14 echo "
";15 echo "生成csv文件"; 16 17 18 //批注：由于涉及文件读写，所以有权限要求。比如通过http方式是无法创建该文件的。（可以通过php file.php方式）

附：iconv 用法 

string iconv ( string $in_charset , string $out_charset , string $str ) 

iconv — Convert string to requested character encoding 

参数： 

1，in_charset  输入字符串的编码 

2，out_charset 输出字符串的编码 

   If you append the string //TRANSLIT to out_charset transliteration is activated. This means that when a character can't be represented in the target charset, it can be approximated through one or several similarly looking characters. If you append the string //IGNORE, characters that cannot be represented in the target charset are silently discarded. Otherwise, str is cut from the first illegal character and an E_NOTICE is generated. 

3，str  被转码的字符串 

返回值： 

返回转码后的字符串或false（返回失败时）。 

可能会用到两个可选的辅助参数：IGNORE和TRANSLIT 

例如：iconv("UTF-8","GB2312//IGNORE",$data)