php擷取本地電腦檔案後下載另存新檔

例1

代碼如下	複製代碼
<?php header(“Content-Type: text/html; charset=UTF-8″); header(“Content-type:application/text”); // 檔案將被稱為 downloaded.pdf header(“Content-Disposition:attachment;filename=log.text”); // PDF 源在 original.pdf 中 readfile(“ptindex_user_profilebasc.html”); ?>

例2

代碼如下

複製代碼

$item=trim($_GET['fileName']).".txt";       $abs_item='/usr/home/檔案夾名稱/檔案夾名稱/檔案夾名稱/'.$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);

上面只能下載本地函數，如果要下載遠端我們可以如下操作PHP遠程下載檔案到本地的函數

代碼如下

複製代碼

<?php 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;         }     } } ?>

最後分享一個支援多種檔案下載的類函數

代碼如下

複製代碼

<?php /**  * 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' => '錯誤',    'args_empty' => '參數錯誤。',    'file_not_exists' => '檔案不存在！',    'file_not_readable' => '檔案不可讀！',   );  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;   // 副檔名   $fileExt = substr(strrchr($filepath, '.'), 1);   // 檔案類型   $fileType = $this->MIMETypes[$fileExt] ? $this->MIMETypes[$fileExt] : 'application/octet-stream';   // 是否是圖片   $isImage = False;   /*   簡述: getimagesize(), 詳見手冊   說明: 判定某個檔案是否為圖片的有效手段, 常用在檔案上傳驗證   */   $imgInfo = @getimagesize($filepath);   if ($imgInfo[2] && $imgInfo['bits'])   {    $fileType = $imgInfo['mime'];  // 支援不標準副檔名    $isImage = True;   }   // 顯示方式   if($this->is_attachment)   {    $attachment = 'attachment';  // 指定彈出下載對話方塊   }   else   {    $attachment = $isImage ? 'inline' : 'attachment';   }   // 讀取檔案   if (is_readable($filepath))   {    /*    簡述: ob_end_clean() 清空並關閉輸出緩衝, 詳見手冊    說明: 關閉輸出緩衝, 使檔案片段內容讀取至記憶體後即被送出, 減少資源消耗    */    ob_end_clean();    /*    HTTP頭資訊: 指示客戶機可以接收生存期不大於指定時間（秒）的響應    */    header('Cache-control: max-age=31536000');    /*    HTTP頭資訊: 快取檔案到期時間(格林威治標準時)    */    header('Expires: ' . gmdate('D, d M Y H:i:s', time()+31536000) . ' GMT');    /*    HTTP頭資訊: 檔案在服務期端最後被修改的時間    Cache-control,Expires,Last-Modified 都是控制瀏覽器緩衝的頭資訊    在一些訪問量巨大的門戶, 合理的設定緩衝能夠避免過多的伺服器請求, 一定程度下緩解伺服器的壓力    */    header('Last-Modified: ' . gmdate('D, d M Y H:i:s' , filemtime($filepath) . ' GMT'));    /*    HTTP頭資訊: 文檔的編碼(Encode)方法, 因為附件請求的檔案多樣化, 改變編碼方式有可能損壞檔案, 故為none    */    header('Content-Encoding: none');    /*    HTTP頭資訊: 告訴瀏覽器當前請求的檔案類型.    1.始終指定為application/octet-stream, 就代表檔案是二進位流, 始終提示下載.    2.指定對應的類型, 如請求的是mp3檔案, 對應的MIME類型是audio/mpeg, IE就會自動啟動Windows Media Player進行播放.    */    header('Content-type: ' . $fileType);    /*    HTTP頭資訊: 如果為attachment, 則告訴瀏覽器, 在訪問時彈出”檔案下載”對話方塊, 並指定儲存時檔案的預設名稱(可以與伺服器的檔案名稱不同)    如果要讓瀏覽器直接顯示內容, 則要指定為inline, 如圖片, 文本    */    header('Content-Disposition: ' . $attachment . '; filename=' . $downname);    /*    HTTP頭資訊: 告訴瀏覽器檔案長度    (IE下載檔案的時候不是有檔案大小資訊麼?)    */    header('Content-Length: ' . filesize($filepath));    // 開啟檔案(二進位唯讀模式)    $fp = fopen($filepath, 'rb');    // 輸出檔案    fpassthru($fp);    // 關閉檔案    fclose($fp);    return true;   }   else   {    $this->ErrInfo = $this->_LANG['err'] . ':' . $this->_LANG['file_not_readable'];    return false;   }  } } ?>