PHP obtains the local computer file and then downloads and saves it as_PHP tutorial

To download files in PHP, we use the readfile() function directly. Readfile() can download the server source file. Let me introduce to you the method and performance of readfile to download files.

Example 1

The code is as follows

Copy code

代码如下	复制代码
header(“Content-Type: text/html; charset=UTF-8″); header(“Content-type:application/text”); // 文件将被称为 downloaded.pdf header(“Content-Disposition:attachment;filename=log.text”); // PDF 源在 original.pdf 中 readfile(“ptindex_user_profilebasc.html”); ?>

header(“Content-Type: text/html; charset=UTF-8″);
header(“Content-type:application/text”);

//The file will be called downloaded.pdf
header(“Content-Disposition:attachment;filename=log.text”);

代码如下

复制代码

$item=trim($_GET['fileName']).".txt"; $abs_item='/usr/home/文件夹名称/文件夹名称/文件夹名称/'.$item; $browser='IE'; header('Content-Type: '.(($browser=='IE' || $browser=='OPERA')? 'application/octetstream':'application/octet-stream')); header('Expires: '.gmdate('D, d M Y H:i:s').' GMT'); header('Content-Transfer-Encoding: binary'); header('Content-Length: '.filesize($abs_item)); if($browser=='IE') { header('Content-Disposition: attachment; filename="'.$item.'"'); header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); header('Pragma: public'); } else { header('Content-Disposition: attachment; filename="'.$item.'"'); header('Cache-Control: no-cache, must-revalidate'); header('Pragma: no-cache'); } @readfile($abs_item);

<🎜>// PDF source is in original.pdf
readfile("ptindex_user_profilebasc.html");<🎜> <🎜>?>

Example 2

The code is as follows

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$item=trim($_GET['fileName']).".txt"; $abs_item='/usr/home/folder name/folder name/folder name/'.$item; $browser='IE'; header('Content-Type: '.(($browser=='IE' || $browser=='OPERA')?          'application/octetstream':'application/octet-stream'));                                     header('Expires: '.gmdate('D, d M Y H:i:s').' GMT'); header('Content-Transfer-Encoding: binary'); header('Content-Length: '.filesize($abs_item)); If($browser=='IE') { header('Content-Disposition: attachment; filename="'.$item.'"'); header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); header('Pragma: public'); } else { header('Content-Disposition: attachment; filename="'.$item.'"'); header('Cache-Control: no-cache, must-revalidate'); header('Pragma: no-cache'); }   @readfile($abs_item);

The above can only download the local function. If you want to download the remote function, we can operate the PHP function to remotely download the file to the local function as follows

The code is as follows

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代码如下

复制代码

echo httpcopy("/baidu_sylogo1.gif"); function httpcopy($url, $file="", $timeout=60) { $file = empty($file) ? pathinfo($url,PATHINFO_BASENAME) : $file; $dir = pathinfo($file,PATHINFO_DIRNAME); !is_dir($dir) && @mkdir($dir,0755,true); $url = str_replace(" ","%20",$url); if(function_exists('curl_init')) { $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_TIMEOUT, $timeout); curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); $temp = curl_exec($ch); if(@file_put_contents($file, $temp) && !curl_error($ch)) { return $file; } else { return false; } } else { $opts = array( "http"=>array(             "method"=>"GET",             "header"=>"",             "timeout"=>$timeout)         );         $context = stream_context_create($opts);         if(@copy($url, $file, $context)) {             //$http_response_header             return $file;         } else {             return false;         }     } } ?>

<🎜>echo httpcopy("/baidu_sylogo1.gif");<🎜> <🎜>function httpcopy($url, $file="", $timeout=60) {
$file = empty($file) ? pathinfo($url,PATHINFO_BASENAME) : $file;
$dir = pathinfo($file,PATHINFO_DIRNAME);
!is_dir($dir) && @mkdir($dir,0755,true);
$url = str_replace(" ","%20",$url);<🎜> <🎜> if(function_exists('curl_init')) {
             $ch = curl_init();
         curl_setopt($ch, CURLOPT_URL, $url);
         curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
          $temp = curl_exec($ch);
If(@file_put_contents($file, $temp) && !curl_error($ch)) {
                return $file;
          } else {
             return false;
         }
} else {
          $opts = array(
"http"=>array(
"method"=>"GET",
"header"=>"",
"timeout"=>$timeout)
);
          $context = stream_context_create($opts);
If(@copy($url, $file, $context)) {
                     //$http_response_header
                return $file;
          } else {
             return false;
         }
}
}
?>

Finally share a class function that supports multiple file downloads

The code is as follows

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/**  * 使用方法：  * require_once 'download.class.php';  * $filepath = './path/filename.html';  * $downname = 'downname.html';  * $down = new download($filepath,$downname);  * 或  * $down = new download();  *  **/ class download { var $filepath; var $downname; var $ErrInfo; var $is_attachment = false; var $_LANG = array( 'err' => 'Error', 'args_empty' => 'Wrong parameter. ', 'file_not_exists' => 'The file does not exist! ', 'file_not_readable' => 'The file is not readable! ', ); var $MIMETypes = array( 'ez' => 'application/andrew-inset', 'hqx' => 'application/mac-binhex40', 'cpt' => 'application/mac-compactpro', 'doc' => 'application/msword', 'bin' => 'application/octet-stream', 'dms' => 'application/octet-stream', 'lha' => 'application/octet-stream', 'lzh' => 'application/octet-stream', 'exe' => 'application/octet-stream', 'class' => 'application/octet-stream', 'so' => 'application/octet-stream', 'dll' => 'application/octet-stream', 'oda' => 'application/oda', 'pdf' => 'application/pdf', 'ai' => 'application/postscrīpt', 'eps' => 'application/postscrīpt', 'ps' => 'application/postscrīpt', 'smi' => 'application/smil', 'smil' => 'application/smil', 'mif' => 'application/vnd.mif', 'xls' => 'application/vnd.ms-excel', 'ppt' => 'application/vnd.ms-powerpoint', 'wbxml' => 'application/vnd.wap.wbxml', 'wmlc' => 'application/vnd.wap.wmlc', 'wmlsc' => 'application/vnd.wap.wmlscrīptc', 'bcpio' => 'application/x-bcpio', 'vcd' => 'application/x-cdlink', 'pgn' => 'application/x-chess-pgn', 'cpio' => 'application/x-cpio', 'csh' => 'application/x-csh', 'dcr' => 'application/x-director', 'dir' => 'application/x-director', 'dxr' => 'application/x-director', 'dvi' => 'application/x-dvi', 'spl' => 'application/x-futuresplash', 'gtar' => 'application/x-gtar', 'hdf' => 'application/x-hdf', 'js' => 'application/x-javascrīpt', 'skp' => 'application/x-koan', 'skd' => 'application/x-koan', 'skt' => 'application/x-koan', 'skm' => 'application/x-koan', 'latex' => 'application/x-latex', 'nc' => 'application/x-netcdf', 'cdf' => 'application/x-netcdf', 'sh' => 'application/x-sh', 'shar' => 'application/x-shar', 'swf' => 'application/x-shockwave-flash', 'sit' => 'application/x-stuffit', 'sv4cpio' => 'application/x-sv4cpio', 'sv4crc' => 'application/x-sv4crc', 'tar' => 'application/x-tar', 'tcl' => 'application/x-tcl', 'tex' => 'application/x-tex', 'texinfo' => 'application/x-texinfo',    'texi' => 'application/x-texinfo',    't' => 'application/x-troff',    'tr' => 'application/x-troff',    'roff' => 'application/x-troff',    'man' => 'application/x-troff-man',    'me' => 'application/x-troff-me',    'ms' => 'application/x-troff-ms',    'ustar' => 'application/x-ustar',    'src' => 'application/x-wais-source',    'xhtml' => 'application/xhtml+xml',    'xht' => 'application/xhtml+xml',    'zip' => 'application/zip',    'au' => 'audio/basic',    'snd' => 'audio/basic',    'mid' => 'audio/midi',    'midi' => 'audio/midi',    'kar' => 'audio/midi',    'mpga' => 'audio/mpeg',    'mp2' => 'audio/mpeg',    'mp3' => 'audio/mpeg',    'wma' => 'audio/mpeg',    'aif' => 'audio/x-aiff',    'aiff' => 'audio/x-aiff',    'aifc' => 'audio/x-aiff',    'm3u' => 'audio/x-mpegurl',    'ram' => 'audio/x-pn-realaudio',    'rm' => 'audio/x-pn-realaudio',    'rpm' => 'audio/x-pn-realaudio-plugin',    'ra' => 'audio/x-realaudio',    'wav' => 'audio/x-wav',    'pdb' => 'chemical/x-pdb',    'xyz' => 'chemical/x-xyz',    'bmp' => 'image/bmp',    'gif' => 'image/gif',    'ief' => 'image/ief',    'jpeg' => 'image/jpeg',    'jpg' => 'image/jpeg',    'jpe' => 'image/jpeg',    'png' => 'image/png',    'tiff' => 'image/tiff',    'tif' => 'image/tiff',    'djvu' => 'image/vnd.djvu',    'djv' => 'image/vnd.djvu',    'wbmp' => 'image/vnd.wap.wbmp',    'ras' => 'image/x-cmu-raster',    'pnm' => 'image/x-portable-anymap',    'pbm' => 'image/x-portable-bitmap',    'pgm' => 'image/x-portable-graymap',    'ppm' => 'image/x-portable-pixmap',    'rgb' => 'image/x-rgb',    'xbm' => 'image/x-xbitmap',    'xpm' => 'image/x-xpixmap',    'xwd' => 'image/x-xwindowdump',    'igs' => 'model/iges',    'iges' => 'model/iges',    'msh' => 'model/mesh',    'mesh' => 'model/mesh',    'silo' => 'model/mesh',    'wrl' => 'model/vrml',    'vrml' => 'model/vrml',    'css' => 'text/css',    'html' => 'text/html',    'htm' => 'text/html',    'asc' => 'text/plain',    'txt' => 'text/plain',    'rtx' => 'text/richtext',    'rtf' => 'text/rtf',    'sgml' => 'text/sgml',    'sgm' => 'text/sgml',    'tsv' => 'text/tab-separated-values',    'wml' => 'text/vnd.wap.wml',    'wmls' => 'text/vnd.wap.wmlscrīpt',    'etx' => 'text/x-setext',    'xsl' => 'text/xml',    'xml' => 'text/xml',    'mpeg' => 'video/mpeg',    'mpg' => 'video/mpeg',    'mpe' => 'video/mpeg',    'qt' => 'video/quicktime',    'mov' => 'video/quicktime',    'mxu' => 'video/vnd.mpegurl',    'avi' => 'video/x-msvideo',    'movie' => 'video/x-sgi-movie',    'wmv' => 'application/x-mplayer2',    'ice' => 'x-conference/x-cooltalk',   );    function download($filepath='',$downname='')  {   if($filepath == '' AND !$this->filepath)   {    $this->ErrInfo = $this->_LANG['err'] . ':' . $this->_LANG['args_empty'];    return false;   }   if($filepath == '') $filepath = $this->filepath;   if(!file_exists($filepath))   {    $this->ErrInfo = $this->_LANG['err'] . ':' . $this->_LANG['file_not_exists'];    return false;   }   if($downname == '' AND !$this->downname) $downname = $filepath;   if($downname == '') $downname = $this->downname;   // 文件扩展名   $fileExt = substr(strrchr($filepath, '.'), 1);   // 文件类型   $fileType = $this->MIMETypes[$fileExt] ? $this->MIMETypes[$fileExt] : 'application/octet-stream';   // 是否是图片   $isImage = False;   /*   简述: getimagesize(), 详见手册   说明: 判定某个文件是否为图片的有效手段, 常用在文件上传验证   */   $imgInfo = @getimagesize($filepath);   if ($imgInfo[2] && $imgInfo['bits'])   {    $fileType = $imgInfo['mime'];  // 支持不标准扩展名    $isImage = True;   }   // 显示方式   if($this->is_attachment)   {    $attachment = 'attachment';  // 指定弹出下载对话框   }   else   {    $attachment = $isImage ? 'inline' : 'attachment';   }   // 读取文件   if (is_readable($filepath))   {    /*    简述: ob_end_clean() 清空并关闭输出缓冲, 详见手册    说明: 关闭输出缓冲, 使文件片段内容读取至内存后即被送出, 减少资源消耗    */    ob_end_clean();    /*    HTTP头信息: 指示客户机可以接收生存期不大于指定时间（秒）的响应    */    header('Cache-control: max-age=31536000');    /*    HTTP头信息: 缓存文件过期时间(格林威治标准时)    */    header('Expires: ' . gmdate('D, d M Y H:i:s', time()+31536000) . ' GMT');    /*    HTTP头信息: 文件在服务期端最后被修改的时间    Cache-control,Expires,Last-Modified 都是控制浏览器缓存的头信息    在一些访问量巨大的门户, 合理的设置缓存能够避免过多的服务器请求, 一定程度下缓解服务器的压力    */    header('Last-Modified: ' . gmdate('D, d M Y H:i:s' , filemtime($filepath) . ' GMT'));    /*    HTTP头信息: 文档的编码(Encode)方法, 因为附件请求的文件多样化, 改变编码方式有可能损坏文件, 故为none    */    header('Content-Encoding: none');    /*    HTTP头信息: 告诉浏览器当前请求的文件类型.    1.始终指定为application/octet-stream, 就代表文件是二进制流, 始终提示下载.    2.指定对应的类型, 如请求的是mp3文件, 对应的MIME类型是audio/mpeg, IE就会自动启动Windows Media Player进行播放.    */    header('Content-type: ' . $fileType);    /*    HTTP头信息: 如果为attachment, 则告诉浏览器, 在访问时弹出”文件下载”对话框, 并指定保存时文件的默认名称(可以与服务器的文件名不同)    如果要让浏览器直接显示内容, 则要指定为inline, 如图片, 文本    */    header('Content-Disposition: ' . $attachment . '; filename=' . $downname);    /*    HTTP头信息: 告诉浏览器文件长度    (IE下载文件的时候不是有文件大小信息么?)    */ header('Content-Length: ' . filesize($filepath)); //Open file (binary read-only mode) $fp = fopen($filepath, 'rb'); // Output file fpassthru($fp); //Close file fclose($fp); Return true; } else { $this->ErrInfo = $this->_LANG['err'] . ':' . $this->_LANG['file_not_readable']; Return false; } } } ?>

http://www.bkjia.com/PHPjc/631556.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/631556.htmlTechArticleWhat we use most to download files in php is to directly use the readfile() function. readfile() can achieve The server source file is downloaded. Now I will introduce to you how to download the file through readfile...