PHP header function Implementation download short point renewal program

For example: Download the output file size, file name, etc.
The premise is that the. htaccess file is configured to add a sentence
Setenv No-gzip Dont-vary
is to not compress files against the file

Example 1

The code is as follows

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<?php function Download ($file _dir, $file _name) Parameter description: File_dir: directory where files reside file_name: filename { $file _dir = Chop ($file _dir);//Remove extra spaces from the path The path to the file to download if ($file _dir!= ') { $file _path = $file _dir; if (substr ($file _dir,strlen ($file _dir) -1,strlen ($file _dir))!= '/') $file _path. = '/'; $file _path. = $file _name; } else { $file _path = $file _name; } Determine if the file you want to download exists if (!file_exists ($file _path)) { Echo ' Sorry, the file you are downloading does not exist. '; return false; } $file _size = filesize ($file _path); @header ("Cache-control:public"); @header ("Pragma:public"); Header ("Content-encoding:gzip"); @header ("Content-type:application/octetstream"); Header ("Content-length: $file _size"); Header ("Accept-ranges:bytes"); Header ("content-disposition:attachment; Filename= ". $file _name); $fp = fopen ($file _path, "R"); Fpassthru ($FP); return true; } Download (' Path parameter ', ' filename '); ?>

Example 2

The code is as follows

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$fname = './mmldzg.mp3 '; $fp = fopen ($fname, ' RB '); $fsize = FileSize ($fname); if (Isset ($_server[' Http_range ')) && ($_server[' http_range ']!= "") && Preg_match ("/^bytes=" ([0-9]+)-$ /i ", $_server[' Http_range '], $match) && ($match [1] < $fsize)) { $start = $match [1]; } else { $start = 0; } @header ("Cache-control:public"); @header ("Pragma:public"); if ($star--> 0) { Fseek ($fp, $start); Header ("http/1.1 206 Partial Content"); Header ("Content-length:"). ($fsize-$start)); Header ("Content-ranges:bytes". $start. "-" . ($fsize-1). "/" . $fsize); } else { Header ("Content-length: $fsize"); Header ("Accept-ranges:bytes"); } @header ("Content-type:application/octet-stream"); @header ("Content-disposition:attachment;filename=mmdld.mp3"); Fpassthru ($FP);

The Fpassthru () function outputs all remaining data at the file pointer.

This function reads the given file pointer from the current location to EOF and writes the result to the output buffer

The above two examples of Chinese support is not good, the following function is a good solution to this problem

The code is as follows

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<?php /** * Php-http Breakpoint Continuous Transmission implementation * @param string $path: The path where the file is located * @param string $file: File name * @return void */ function Download ($path, $file) { $real = $path. ' /'. $file; if (!file_exists ($real)) { return false; } $size = FileSize ($real); $size 2 = $size-1; $range = 0; if (Isset ($_server[' Http_range ')) { Header (' http/1.1 206 Partial Content '); $range = str_replace (' = ', '-', $_server[' Http_range ')); $range = Explode ('-', $range); $range = Trim ($range [1]); Header (' Content-length: '. $size); Header (' Content-range:bytes '. $range. '-'. $size 2. ' /'. $size); } else { Header (' Content-length: '. $size); Header (' Content-range:bytes 0-'. $size 2. ' /'. $size); } Header (' accenpt-ranges:bytes '); Header (' Application/octet-stream '); Header ("Cache-control:public"); Header ("Pragma:public"); Solve Chinese garbled problem when downloading in IE $ua = $_server[' http_user_agent ']; if (Preg_match ('/msie/', $ua)) { $ie _filename = str_replace (' + ', '%20 ', UrlEncode ($file)); Header (' Content-dispositon:attachment filename= '. $ie _filename); } else { Header (' Content-dispositon:attachment filename= '. $file); } $fp = fopen ($real, ' rb+ '); Fseek ($fp, $range); while (!feof ($fp)) { Set_time_limit (0); Print (Fread ($FP, 1024)); Flush (); Ob_flush (); } Fclose ($FP); } /*end of php*/