PHP file download (supports Chinese names)_PHP tutorial

php implementation file download (supports Chinese name)_PHP tutorial

/*======================================================
  $FileName 为文件名称,必传
  $FilePath 为文件路径.选填,可以为相对路径或者绝对路径
      路径只能由英文跟数据组成,不能带有中文
 ======================================================*/
<?php 
 header("Content-type: text/html;charset=utf-8");
 if(strlen($FileName)<=3){echo "下载失败：你所以下载的文件信息有误";return;}
 $FileName=iconv("utf-8","gb2312",$FileName);//进行文件名格式转换,以防中文乱码
 //开始判断路径
 if(!is_null($FilePath)&&strlen($FilePath)>1){

  if(substr($FilePath,0,1)==&#39;/&#39;){//判断是否为绝对路径

   $FilePath=$_SERVER[&#39;DOCUMENT_ROOT&#39;].$FilePath;

    }
  if(substr($FilePath,-1)!="/"){//检查最后是否为 / 结尾

   $FilePath=$FilePath.&#39;/&#39;;

    }
  if(is_numeric(strpos($FilePath,":\"))){//检查是否为绝对路径

   $FilePath=str_replace("/","\",$FilePath);

    }
   }elseif(strlen($FilePath)==1&&$FilePath!="/"){

    $FilePath=$FilePath."/";

   }else{

    $FilePath="";

  }
  if(!file_exists($FilePath.$FileName)){

   echo"下载失败：所要下载的文件未找到";return;

   }
  /*================================================
   发送下载相关的头部信息
  =================================================*/

  header("Content-type: application/octet-stream");

  header("Accept-Ranges: bytes");//按照字节大小返回

  header("Accept-Length: $FileSize");//返回文件大小

  header("Content-Disposition: attachment; filename=".$FileName);//这里客户端的弹出对话框，对应的文件名

  /*================================================
   开始下载相关
  =================================================*/ 
$FileSize=filesize($FilePath.$FileName);

  $File=fopen($FilePath.$FileName,"r");//打开文件

  $FileBuff=512;

  while($FileSize>=0){

   $FileSize-=$FileBuff;

   echo fread($File,$FileBuff);

  }

  fclose($File);
 }
?>

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