用php把强制下载各类文件的方法

最新推荐文章于 2021-03-18 21:55:24 发布

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最新推荐文章于 2021-03-18 21:55:24 发布

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分类专栏： php学习文章标签：数据转化文件 php

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本文介绍了如何使用PHP实现强制下载各种类型文件的方法，特别是针对TXT文件的下载。通过在ThinkPHP框架中处理数据，拼接成正确格式，利用特定字符如' '和' '来确保文件内容的正确显示。

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可以下载各个类型的文件，目前我只使用了下载txt文件，可以使用

这个是最牛逼的下载类，可惜不是我写的。。。转载地址关了找不到了，对作者说声抱歉和感谢

function download($file){  
   
    //First, see if the file exists  
    if (!is_file($file)) { die("<b>404 File not found!</b>"); }  
   
    //Gather relevent info about file  
    $len = filesize($file);  
    $filename = basename($file);  
    $file_extension = strtolower(substr(strrchr($filename,"."),1));  
   
    //This will set the Content-Type to the appropriate setting for the file  
    switch( $file_extension ) {  
      case "pdf": $ctype="application/pdf"; break;  
      case "txt": $ctype="application/txt"; break;  
      case "exe": $ctype="application/octet-stream"; break;  
      case "zip": $ctype="application/zip"; break;  
      case "doc": $ctype="application/msword"; break;  
      case "xls": $ctype="application/vnd.ms-excel"; break;  
      case "ppt": $ctype="application/vnd.ms-powerpoint"; break;  
      case "gif": $ctype="image/gif"; break;  
      case "png": $ctype="image/png"; break;  
      case "jpeg":  
      case "jpg": $ctype="image/jpg"; break;  
      case "mp3": $ctype="audio/mpeg"; break;  
      case "wav": $ctype="audio/x-wav"; break;  
      case "mpeg":  
      case "mpg":  
      case "mpe": $ctype="video/mpeg"; break;  
      case "mov": $ctype="video/quicktime"; break;  
      case "avi": $ctype="video/x-msvideo"; break;  
   
      //The following are for extensions that shouldn't be downloaded (sensitive stuff, like php files)  
      case "php":  
      case "htm":  
      case "html":  
      //case "txt": die("<b>Cannot be used for ". $file_extension ." files!</b>"); break;  
   
      default: $ctype="application/force-download";  
    }  
   
    //Begin writing headers  
    header("Pragma: public");  
    header("Expires: 0");  
    header("Cache-Control: must-revalidate, post-check=0, pre-check=0");  
    header("Cache-Control: public");   
    header("Content-Description: File Transfer");  
       
    //Use the switch-generated Content-Type  
    header("Content-Type: $ctype");  
   
    //Force the download  
    $header="Content-Disposition: attachment; filename=".$filename.";";  
    header($header );  
    header("Content-Transfer-Encoding: binary");  
    header("Content-Length: ".$len);  
    @readfile($file);  
    exit;  
}

我使用的是thinkphp框架，获取数据后，对数据进行拼接，保证格式，其中换行和tab使用\r\n,\t 注意一定要用双引号，单引号不解析，

	public function totext(){
		$todayusermessage = M("Todayusermessage");
		$todayusermessageArr = $todayusermessage->select();
		$filename = './Public/Files/'.date('Y_m_d',time()).'.txt';
		$data = "序号\t姓名\t手机号\r\n";
		foreach($todayusermessageArr as $k=>$v){
			$data .= $k."\t".$v['name']."\t".$v['phone']."\r\n";
		}
		$file = file_put_contents($filename, $data);
		// 写好之后下载
		$re = download($filename);
		//检测是否设置文件名和文件是否存在 
	
	}

下载后如图