php生成CSV格式(转)

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。

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

 $EXCEL_OUT="id,title,info\n";//生成字段

 $query="select * from tb_info";//需要生成的数据查询语句
 $result=mysql_query($query);
 while($ROW=mysql_fetch_array($result))
 {
    $id=$ROW["id"];
    $title=$ROW["title"];
    $content=$ROW["content"];

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

 header("Content-type:text/csv");
 header("Content-Disposition:attachment;filename=生成文件名称.csv"); //“生成文件名称”=自定义
 header('Cache-Control:must-revalidate,post-check=0,pre-check=0');
 header('Expires:0');
 header('Pragma:public');
 echo $EXCEL_OUT;
 ?>

2，生成.csv文件（不下载）

 $action = $_GET['action'];
 if ($action=='make'){
  $fp = fopen("csv.csv","a"); //打开csv文件，如果不存在则创建
  $data_arr1 = array("","","","","公司"); //第一行数据
  $data_arr2 = array("","","","","中午"); //第二行数据
  $data_str1 = implode(",",$data_arr1); //用 ' 分割成字符串
  $data_str2 = implode(",",$data_arr2); //用 ' 分割成字符串
  $data_str = $data_str1."\r\n".$data_str2."\r\n"; //加入换行符

  fwrite($fp,iconv('UTF-8','GB2312',$data_str)); //写入数据
  fclose($fp); //关闭文件句柄
  echo "生成成功";
 }
 echo "<br>";
 echo "<a href='?action=make'>生成csv文件</a>"; 

 //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)