php生成CSV格式

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 include_once("conn/conn.php");//连接数据库

 3 

 4 $EXCEL_OUT="id,title,info\n";//生成字段

 5 

 6 $query="select * from tb_info";//需要生成的数据查询语句

 7 $result=mysql_query($query);

 8 while($ROW=mysql_fetch_array($result))

 9 {

10    $id=$ROW["id"];

11    $title=$ROW["title"];

12    $content=$ROW["content"];

13 

14     $EXCEL_OUT.=iconv('UTF-8','GB2312',"$id,$title,$content\n");

15 }

16 

17 header("Content-type:text/csv"); 

18 header("Content-Disposition:attachment;filename=生成文件名称.csv"); //“生成文件名称”=自定义

19 header('Cache-Control:must-revalidate,post-check=0,pre-check=0'); 

20 header('Expires:0'); 

21 header('Pragma:public'); 

22 echo $EXCEL_OUT;

23 ?>

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 "<br>";

15 echo "<a href='?action=make'>生成csv文件</a>"; 

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)