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php实现读写csv文件的header()函数使用
php实现读写csv文件的header()函数使用
定义和用法
header() 函数向客户端发送原始的 HTTP 报头。

认识到一点很重要,即必须在任何实际的输出被发送之前调用 header() 函数(在 PHP 4 以及更高的版本中,您可以使用输出缓存来解决此问题):


// 结果出错
// 在调用 header() 之前已存在输出
header('Location: http://www.3ppt.com/');
?>语法
header(string,replace,http_response_code)参数 描述
string 必需。规定要发送的报头字符串。
replace 可选。指示该报头是否替换之前的报头,或添加第二个报头。

默认是 true(替换)。false(允许相同类型的多个报头)。

http_response_code 可选。把 HTTP 响应代码强制为指定的值。(PHP 4 以及更高版本可用)


1.定义header()头部输出格式

header("Content-type:application/vnd.ms-excel");  //定义输出的文件类型

header(“content-Disposition:filename=downloaded.pdf”);  //定义输出的文件名,也就是设置一个下载类型,下载的时候对文件从新命名



        header("Content-type:application/vnd.ms-excel");
    header("content-Disposition:filename=downloaded.pdf ");

    echo"1t 2t 3n"; //其中 t 是空白 ,n是回车 (编码规范 不能直接输出)
    echo"1t 2t 3n";
    echo"1t 2t 3n";


    ?>




这时候就可以打开这个php文件,就会提示下载。



也可以以table表格的方式输出;



          header("Content-type:application/vnd.ms-excel ");
     header("content-Disposition:filename=downloaded.pdf");
    ?>
     


       
         
       
       
         
       
       
         
       
     
t00 t01 t02
t10 t11 t12
t20 t21 t22

    

CSV的写入操作:

fputcsv()的使用可参考.



      $fp = fopen('f:/file.csv', 'w');
          fputcsv($fp,array('aaa','bbb','cccc'));
          fputcsv($fp,array('mmm','yyy','haha'));   //fputcsv()可以用数组循环的方式进行实现
           fclose($fp);
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