php下载文件相关资料

快来打我* 2022-07-12 07:57 239阅读 0赞

当下载文件需要与服务端交互时，就需要用脚本来实现，而不是单纯地链接到文件的地址  
  
下载mp3文件的例子  
  
<?php  
  
$file\_path = './data/upload/song/sample.mp3';  
$file\_name = 'sample.mp3';  
$file\_size = filesize($file\_path);  
  
header ( "Pragma: public" );  
header ( "Cache-Control: must-revalidate, post-check=0, pre-check=0" );  
header ( "Cache-Control: private", false );  
header ( "Content-Transfer-Encoding: binary" );  
header ( "Content-Type:audio/mpeg MP3");  
header ( "Content-Length: " . $file\_size);  
header ( "Content-Disposition: attachment; filename=".$file\_name);  
  
echo(file\_get\_contents($file\_path));  
exit;  
  
?>  
  
以下列表来自http://hi.baidu.com/zbzb /blog/item/643cd60021d25d11738b6530.html  
  
Content-type 的说明 '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/postscript',  
'eps' => 'application/postscript',  
'ps' => 'application/postscript',  
'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.wmlscriptc',  
'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-javascript',  
'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',  
'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.wmlscript',  
'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',  
'ice' => 'x-conference/x-cooltalk',  
  
  
  
  
以下列表来自http://snipplr.com/view /11452/mime-content-type/  
  
<?php                                                                    
                                                                         
if(!function\_exists('mime\_content\_type')) \{                              
                                                                         
                                                                         
                                                                         
function mime\_content\_type($filename) \{                                  
                                                                         
                                                                         
                                                                         
$mime\_types = array(                                                     
                                                                         
                                                                         
                                                                         
'txt' => 'text/plain',                                                   
                                                                         
'htm' => 'text/html',                                                    
                                                                         
'html' => 'text/html',                                                   
                                                                         
'php' => 'text/html',                                                    
                                                                         
'css' => 'text/css',                                                     
                                                                         
'js' => 'application/javascript',                                        
                                                                         
'json' => 'application/json',                                            
                                                                         
'xml' => 'application/xml',                                              
                                                                         
'swf' => 'application/x-shockwave-flash',                                
                                                                         
'flv' => 'video/x-flv',                                                  
                                                                         
                                                                         
                                                                         
// images                                                                
                                                                         
'png' => 'image/png',                                                    
                                                                         
'jpe' => 'image/jpeg',                                                   
                                                                         
'jpeg' => 'image/jpeg',                                                  
                                                                         
'jpg' => 'image/jpeg',                                                   
                                                                         
'gif' => 'image/gif',                                                    
                                                                         
'bmp' => 'image/bmp',                                                    
                                                                         
'ico' => 'image/vnd.microsoft.icon',                                     
                                                                         
'tiff' => 'image/tiff',                                                  
                                                                         
'tif' => 'image/tiff',                                                   
                                                                         
'svg' => 'image/svg+xml',                                                
                                                                         
'svgz' => 'image/svg+xml',                                               
                                                                         
                                                                         
                                                                         
// archives                                                              
                                                                         
'zip' => 'application/zip',                                              
                                                                         
'rar' => 'application/x-rar-compressed',                                 
                                                                         
'exe' => 'application/x-msdownload',                                     
                                                                         
'msi' => 'application/x-msdownload',                                     
                                                                         
'cab' => 'application/vnd.ms-cab-compressed',                            
                                                                         
                                                                         
                                                                         
// audio/video                                                           
                                                                         
'mp3' => 'audio/mpeg',                                                   
                                                                         
'qt' => 'video/quicktime',                                               
                                                                         
'mov' => 'video/quicktime',                                              
                                                                         
                                                                         
                                                                         
// adobe                                                                 
                                                                         
'pdf' => 'application/pdf',                                              
                                                                         
'psd' => 'image/vnd.adobe.photoshop',                                    
                                                                         
'ai' => 'application/postscript',                                        
                                                                         
'eps' => 'application/postscript',                                       
                                                                         
'ps' => 'application/postscript',                                        
                                                                         
                                                                         
                                                                         
// ms office                                                             
                                                                         
'doc' => 'application/msword',                                           
                                                                         
'rtf' => 'application/rtf',                                              
                                                                         
'xls' => 'application/vnd.ms-excel',                                     
                                                                         
'ppt' => 'application/vnd.ms-powerpoint',                                
                                                                         
                                                                         
                                                                         
// open office                                                           
                                                                         
'odt' => 'application/vnd.oasis.opendocument.text',                      
                                                                         
'ods' => 'application/vnd.oasis.opendocument.spreadsheet',               
                                                                         
);                                                                       
                                                                         
                                                                         
                                                                         
$ext = strtolower(array\_pop(explode('.',$filename)));                    
                                                                         
if (array\_key\_exists($ext, $mime\_types)) \{                               
                                                                         
return $mime\_types\[$ext\];                                                
                                                                         
\}                                                                        
                                                                         
elseif (function\_exists('finfo\_open')) \{                                 
                                                                         
$finfo = finfo\_open(FILEINFO\_MIME);                                      
                                                                         
$mimetype = finfo\_file($finfo, $filename);                               
                                                                         
finfo\_close($finfo);                                                     
                                                                         
return $mimetype;                                                        
                                                                         
\}                                                                        
                                                                         
else \{                                                                   
                                                                         
return 'application/octet-stream';                                       
                                                                         
\}                                                                        
                                                                         
\}                                                                        
                                                                         
\}                                                                        
                                                                         
?>                                                                       
  
  
以下列表来自http://hi.baidu.com/5labs/blog/item/3a094bc2fabec55eb319a8b9.html  
  
  
  
  
  
  
  
  
1.获取远程文件大小及信息的函数  
  
<?php  
  
//取文件大小函数中  
  
  
    function getFileSize($url)\{  
        //返回一个数组，包含scheme,host,port,path之类的信息  
        $url = parse\_url($url);  
        if($fp = @fsockopen($url\['host'\],empty($url\['port'\])?80:$url\['port'\],$error))\{  
                fputs($fp,"GET ".(empty($url\['path'\])?'/':$url\['path'\])." HTTP/1.1/r/n");  
                fputs($fp,"Host:$url\[host\]/r/n/r/n");  
                while(!feof($fp))\{  
                        $tmp = fgets($fp);  
                        if(trim($tmp) == '')\{  
                                break;  
                        \}else if(preg\_match('/Content-Length:(.\*)/si',$tmp,$arr))\{  
                                return trim($arr\[1\]);  
                        \}  
                \}  
                return null;  
        \}else\{  
                return null;  
        \}  
\}  
  
  
  
echo getFileSize("http://www.dianpub.com/download/xml.rar")  
  
?>  
  
  
  
  
  
2.图片  
  
  
  
  
  
  
  
//记录程序开始的时间  
  
  
  
$BeginTime=getmicrotime();  
  
  
  
  
  
  
  
function GrabImage($url,$filename="") \{  
  
  
  
if($url==""):return false;endif;  
  
  
  
if($filename=="") \{  
  
  
  
$ext=strrchr($url,".");  
  
  
  
if($ext!=".gif" && $ext!=".jpg"):return false;endif;  
  
  
  
$filename=date("dMYHis").$ext;  
  
  
  
\}  
  
  
  
ob\_start();  
  
  
  
readfile($url);  
  
  
  
$img = ob\_get\_contents();  
  
  
  
ob\_end\_clean();  
  
  
  
$size = strlen($img);  
  
  
  
$fp2=@fopen($filename, "a");  
  
  
  
fwrite($fp2,$img);  
  
  
  
fclose($fp2);  
  
  
  
return $filename;  
  
  
  
\}  
  
  
  
  
  
  
  
$img=GrabImage("http://www.dianpub.com/images/\_1978837\_detector\_ap100.jpg","");  
  
  
  
if($img):echo '<pre><img src="'.$img.'"></pre>';else:echo "false";endif;  
  
  
  
  
  
  
  
//记录程序运行结束的时间  
  
  
  
$EndTime=getmicrotime();  
  
  
  
  
  
  
  
//返回运行时间  
  
  
  
exit($EndTime-$BeginTime);  
  
  
  
  
  
  
  
3.全文下载图片  
  
  
  
  
  
  
  
if(!empty($saveremoteimg))  
  
  
  
\{  
  
  
  
$body = stripslashes($body);  
  
  
  
$img\_array = array();  
  
  
  
preg\_match\_all("/(src|SRC)=\[/"|'| \]\{0,\}(http:(.\*)/.(gif|jpg|jpeg|bmp|png))/isU",$body,$img\_array);  
  
  
  
$img\_array = array\_unique($img\_array\[2\]);  
  
  
  
set\_time\_limit(0);  
  
  
  
$imgUrl = $img\_dir."/".strftime("%Y%m%d",time());  
  
  
  
$imgPath = $base\_dir.$imgUrl;  
  
  
  
$milliSecond = strftime("%H%M%S",time());  
  
  
  
if(!is\_dir($imgPath)) @mkdir($imgPath,0777);  
  
  
  
foreach($img\_array as $key =>$value)  
  
  
  
\{  
  
  
  
$value = trim($value);  
  
  
  
$get\_file = @file\_get\_contents($value);  
  
  
  
$rndFileName = $imgPath."/".$milliSecond.$key.".".substr($value,-3,3);  
  
  
  
$fileurl = $imgUrl."/".$milliSecond.$key.".".substr($value,-3,3);  
  
  
  
if($get\_file)  
  
  
  
\{  
  
  
  
$fp = @fopen($rndFileName,"w");  
  
  
  
@fwrite($fp,$get\_file);  
  
  
  
@fclose($fp);  
  
  
  
\}  
  
  
  
$body = ereg\_replace($value,$fileurl,$body);  
  
  
  
\}  
  
  
  
$body = addslashes($body);  
  
  
  
\}  
  
  
  
  
  
  
  
4.PHP远程文件下载类（支持断点续传）  
  
  
  
  
  
  
  
1）.功能:支持断点续传的下载,能计算传输率,能控制传输率  
  
  
  
  
  
  
  
简易使用方法:  
  
  
  
  
  
  
  
$object = new httpdownload();  
  
  
  
$object->set\_byfile($file);//服务器文件名,包括路径  
  
  
  
$object->filename = $filename;//下载另存为的文件名  
  
  
  
$object->download();  
  
  
  
  
  
  
  
类文件：  
  
  
  
  
  
  
  
<?  
  
  
  
      class httpdownload \{  
  
  
  
      var $data = null;  
  
  
  
      var $data\_len = 0;  
  
  
  
      var $data\_mod = 0;  
  
  
  
      var $data\_type = 0;  
  
  
  
      var $data\_section = 0; //section download  
  
  
  
      var $sentSize=0;  
  
  
  
      var $handler = array('auth' => null);  
  
  
  
      var $use\_resume = true;  
  
  
  
      var $use\_autoexit = false;  
  
  
  
      var $use\_auth = false;  
  
  
  
      var $filename = null;  
  
  
  
      var $mime = null;  
  
  
  
      var $bufsize = 2048;  
  
  
  
      var $seek\_start = 0;  
  
  
  
      var $seek\_end = -1;  
  
  
  
      var $totalsizeref = 0;  
  
  
  
      var $bandwidth = 0;  
  
  
  
      var $speed = 0;  
  
  
  
      function initialize() \{  
  
  
  
            global $HTTP\_SERVER\_VARS;  
  
  
  
            if ($this->use\_auth) //use authentication \{  
  
  
  
                  if (!$this->\_auth()) //no authentication \{  
  
  
  
                          header('WWW-Authenticate: Basic realm="Please enter your username and password"');  
  
  
  
                          header('HTTP/1.0 401 Unauthorized');  
  
  
  
                          header('status: 401 Unauthorized');  
  
  
  
                          if ($this->use\_autoexit) exit();  
  
  
  
                          return false;  
  
  
  
                  \}  
  
  
  
            \}  
  
  
  
            if ($this->mime == null) $this->mime = "application/octet-stream"; //default mime  
  
  
  
            if (isset($\_SERVER\['HTTP\_RANGE'\]) || isset($HTTP\_SERVER\_VARS\['HTTP\_RANGE'\])) \{  
  
  
  
                  if (isset($HTTP\_SERVER\_VARS\['HTTP\_RANGE'\])) $seek\_range = substr($HTTP\_SERVER\_VARS\['HTTP\_RANGE'\] , strlen('bytes='));  
  
  
  
                  else $seek\_range = substr($\_SERVER\['HTTP\_RANGE'\] , strlen('bytes='));  
  
  
  
            $range = explode('-',$seek\_range);  
  
  
  
            if ($range\[0\] > 0) \{  
  
  
  
                  $this->seek\_start = intval($range\[0\]);  
  
  
  
            \}  
  
  
  
            if ($range\[1\] > 0) $this->seek\_end = intval($range\[1\]);  
  
  
  
            else $this->seek\_end = -1;  
  
  
  
            if (!$this->use\_resume) \{  
  
  
  
                  $this->seek\_start = 0;  
  
  
  
                  //header("HTTP/1.0 404 Bad Request");  
  
  
  
                  //header("Status: 400 Bad Request");  
  
  
  
                  //exit;  
  
  
  
                  //return false;  
  
  
  
            \} else \{  
  
  
  
                  $this->data\_section = 1;  
  
  
  
            \}  
  
  
  
      \} else \{  
  
  
  
            $this->seek\_start = 0;  
  
  
  
            $this->seek\_end = -1;  
  
  
  
      \}  
  
  
  
      $this->sentSize=0;  
  
  
  
      return true;  
  
  
  
\}  
  
  
  
function header($size,$seek\_start=null,$seek\_end=null) \{  
  
  
  
      header('Content-type: ' . $this->mime);  
  
  
  
      header('Content-Disposition: attachment; filename="' . $this->filename . '"');  
  
  
  
      header('Last-Modified: ' . date('D, d M Y H:i:s /G/M/T' , $this->data\_mod));  
  
  
  
      if ($this->data\_section && $this->use\_resume) \{  
  
  
  
            header("HTTP/1.0 206 Partial Content");  
  
  
  
            header("Status: 206 Partial Content");  
  
  
  
            header('Accept-Ranges: bytes');  
  
  
  
            header("Content-Range: bytes $seek\_start-$seek\_end/$size");  
  
  
  
            header("Content-Length: " . ($seek\_end - $seek\_start + 1));  
  
  
  
      \} else \{  
  
  
  
            header("Content-Length: $size");  
  
  
  
      \}  
  
  
  
\}  
  
  
  
function download\_ex($size) \{  
  
  
  
      if (!$this->initialize()) return false;  
  
  
  
      ignore\_user\_abort(true);  
  
  
  
      //Use seek end here  
  
  
  
      if ($this->seek\_start > ($size - 1)) $this->seek\_start = 0;  
  
  
  
      if ($this->seek\_end <= 0) $this->seek\_end = $size - 1;  
  
  
  
      $this->header($size,$seek,$this->seek\_end);  
  
  
  
      $this->data\_mod = time();  
  
  
  
      return true;  
  
  
  
\}  
  
  
  
function download() \{  
  
  
  
      if (!$this->initialize()) return false;  
  
  
  
      try \{  
  
  
  
            error\_log("begin download/n", 3,"/usr/local/www/apache22/LOGS/apache22\_php.err");  
  
  
  
            $seek = $this->seek\_start;  
  
  
  
            $speed = $this->speed;  
  
  
  
            $bufsize = $this->bufsize;  
  
  
  
            $packet = 1;  
  
  
  
            //do some clean up  
  
  
  
            @ob\_end\_clean();  
  
  
  
            $old\_status = ignore\_user\_abort(true);  
  
  
  
            @set\_time\_limit(0);  
  
  
  
            $this->bandwidth = 0;  
  
  
  
            $size = $this->data\_len;  
  
  
  
            if ($this->data\_type == 0) //download from a file \{  
  
  
  
                  $size = filesize($this->data);  
  
  
  
                  if ($seek > ($size - 1)) $seek = 0;  
  
  
  
                  if ($this->filename == null) $this->filename = basename($this->data);  
  
  
  
                  $res = fopen($this->data,'rb');  
  
  
  
                  if ($seek) fseek($res , $seek);  
  
  
  
                  if ($this->seek\_end < $seek) $this->seek\_end = $size - 1;  
  
  
  
                  $this->header($size,$seek,$this->seek\_end); //always use the last seek  
  
  
  
                  $size = $this->seek\_end - $seek + 1;  
  
  
  
                  while (!(connection\_aborted() || connection\_status() == 1) && $size > 0) \{  
  
  
  
                        if ($size < $bufsize) \{  
  
  
  
                              echo fread($res , $size);  
  
  
  
                              $this->bandwidth += $size;  
  
  
  
                              $this->sentSize+=$size;  
  
  
  
                        \} else \{  
  
  
  
                        echo fread($res , $bufsize);  
  
  
  
                        $this->bandwidth += $bufsize;  
  
  
  
                        $this->sentSize+=$bufsize;  
  
  
  
                  \}  
  
  
  
                  $size -= $bufsize;  
  
  
  
                  flush();  
  
  
  
                  if ($speed > 0 && ($this->bandwidth > $speed\*$packet\*1024)) \{  
  
  
  
                        sleep(1);  
  
  
  
                        $packet++;  
  
  
  
                  \}  
  
  
  
            \}  
  
  
  
            fclose($res);  
  
  
  
      \}  
  
  
  
      elseif ($this->data\_type == 1) //download from a string  
  
  
  
      \{  
  
  
  
            if ($seek > ($size - 1)) $seek = 0;  
  
  
  
            if ($this->seek\_end < $seek) $this->seek\_end = $this->data\_len - 1;  
  
  
  
            $this->data = substr($this->data , $seek , $this->seek\_end - $seek + 1);  
  
  
  
            if ($this->filename == null) $this->filename = time();  
  
  
  
            $size = strlen($this->data);  
  
  
  
            $this->header($this->data\_len,$seek,$this->seek\_end);  
  
  
  
            while (!connection\_aborted() && $size > 0) \{  
  
  
  
                  if ($size < $bufsize) \{  
  
  
  
                        $this->bandwidth += $size;  
  
  
  
                        $this->sentSize+=$size;  
  
  
  
                  \} else \{  
  
  
  
                        $this->bandwidth += $bufsize;  
  
  
  
                        $this->sentSize+=$bufsize;  
  
  
  
                  \}  
  
  
  
                  echo substr($this->data , 0 , $bufsize);  
  
  
  
                  $this->data = substr($this->data , $bufsize);  
  
  
  
                  $size -= $bufsize;  
  
  
  
                  flush();  
  
  
  
                  if ($speed > 0 && ($this->bandwidth > $speed\*$packet\*1024)) \{  
  
  
  
                        sleep(1);  
  
  
  
                        $packet++;  
  
  
  
                  \}  
  
  
  
            \}  
  
  
  
      \} else if ($this->data\_type == 2) \{  
  
  
  
            //just send a redirect header  
  
  
  
            header('location: ' . $this->data);  
  
  
  
      \}  
  
  
  
      if($this->totalsizeref==$this->sentSize )error\_log("end download/n", 3,"/usr/local/www/apache22/LOGS/apache22\_php.err");  
  
  
  
      else error\_log("download is canceled/n", 3,"/usr/local/www/apache22/LOGS/apache22\_php.err");  
  
  
  
      if ($this->use\_autoexit) exit();  
  
  
  
      //restore old status  
  
  
  
      ignore\_user\_abort($old\_status);  
  
  
  
      set\_time\_limit(ini\_get("max\_execution\_time"));  
  
  
  
\}  
  
  
  
catch(Exception $e) \{  
  
  
  
      error\_log("cancel download/n".$e, 3,"/usr/local/www/apache22/LOGS/apache22\_php.err");  
  
  
  
\}  
  
  
  
      return true;  
  
  
  
\}  
  
  
  
function set\_byfile($dir) \{  
  
  
  
      if (is\_readable($dir) && is\_file($dir)) \{  
  
  
  
            $this->data\_len = 0;  
  
  
  
            $this->data = $dir;  
  
  
  
            $this->data\_type = 0;  
  
  
  
            $this->data\_mod = filemtime($dir);  
  
  
  
            $this->totalsizeref = filesize($dir);  
  
  
  
            return true;  
  
  
  
      \} else return false;  
  
  
  
\}  
  
  
  
function set\_bydata($data) \{  
  
  
  
      if ($data == '') return false;  
  
  
  
            $this->data = $data;  
  
  
  
            $this->data\_len = strlen($data);  
  
  
  
            $this->data\_type = 1;  
  
  
  
            $this->data\_mod = time();  
  
  
  
            return true;  
  
  
  
\}  
  
  
  
function set\_byurl($data) \{  
  
  
  
      $this->data = $data;  
  
  
  
      $this->data\_len = 0;  
  
  
  
      $this->data\_type = 2;  
  
  
  
      return true;  
  
  
  
\}  
  
  
  
function set\_lastmodtime($time) \{  
  
  
  
      $time = intval($time);  
  
  
  
      if ($time <= 0) $time = time();  
  
  
  
      $this->data\_mod = $time;  
  
  
  
\}  
  
  
  
function \_auth() \{  
  
  
  
      if (!isset($\_SERVER\['PHP\_AUTH\_USER'\])) return false;  
  
  
  
      if (isset($this->handler\['auth'\]) && function\_exists($this->handler\['auth'\])) \{  
  
  
  
            return $this->handler\['auth'\]('auth' , $\_SERVER\['PHP\_AUTH\_USER'\],$\_SERVER\['PHP\_AUTH\_PW'\]);  
  
  
  
      \} else return true; //you must use a handler  
  
  
  
      \}  
  
  
  
\}  
  
  
  
?>  
  
  
  
  
  
  
  
5. php 使用GD库下载远程图片  
  
  
  
  
  
  
  
<?php   
  
  
  
$imgname = "http://imgdujia.kuxun.cn/newpic/929/812929/4.jpg";   
  
  
  
$src\_im = imagecreatefromjpeg($imgname);   
  
  
  
$srcW = ImageSX($src\_im);                                                       //获得图像的宽   
  
  
  
$srcH = ImageSY($src\_im);                                                       //获得图像的高   
  
  
  
  
  
  
  
$dst\_im = ImageCreateTrueColor($srcW,$srcH);                    //创建新的图像对象   
  
  
  
  
  
  
  
imagecopy($dst\_im, $src\_im, 0, 0, 0, 0, $srcW, $srcH);   
  
  
  
imagejpeg($dst\_im, "newpic.jpg");                                               //创建缩略图文件   
  
  
  
  
  
  
  
echo "<img src="newpic.jpg" mce\_src="newpic.jpg"></img>";   
  
  
  
  
  
  
  
?>  
  
  
  
  
  
  
  
<?php  
  
  
  
header("Content-type: image/png");  
  
  
  
$im = imagecreatefromjpeg("http://postimg.mop.com/200602/02/74/122374/200602022335325121.JPG");  
  
  
  
$white = imagecolorallocate($im, 0xF9, 0xD7, 0xCD);  
  
  
  
imagefill($im, 0, 0,$white);  
  
  
  
$text\_color = imagecolorallocate($im, 233, 14, 91);  
  
  
  
imagestring($im, 1, 5, 5,   "A Simple Text String", $text\_color);  
  
  
  
imagepng($im);  
  
  
  
imagedestroy($im);  
  
  
  
?>  
  
  
  
  
  
  
  
注意这个要把PHP分配内存调大，应用时用大内存服务器