note 105676 added to function.gzopen

gzopen("php://output","wb") doesn't work on a web server, nor does fopen("compress.zlib://php://output","wb"). Here is a snippet to gzip a file and output it on the fly, without using a temporary file, without reading the file into memory, and without reading the file more than once: <?php $fin = fopen($file, "rb"); if ($fin !== FALSE) { $fout = fopen("php://output", "wb"); if ($fout !== FALSE) { // write gzip header fwrite($fout, "\x1F\x8B\x08\x08".pack("V", filemtime($file))."\0\xFF", 10); // write the original file name $oname = str_replace("\0", "", basename($file)); fwrite($fout, $oname."\0", 1+strlen($oname)); // add the deflate filter using default compression level $fltr = stream_filter_append($fout, "zlib.deflate", STREAM_FILTER_WRITE, -1); // set up the CRC32 hashing context $hctx = hash_init("crc32b"); // turn off the time limit if (!ini_get("safe_mode")) set_time_limit(0); $con = TRUE; $fsize = 0; while (($con !== FALSE) && !feof($fin)) { // deflate works best with buffers >32K $con = fread($fin, 64 * 1024); if ($con !== FALSE) { hash_update($hctx, $con); $clen = strlen($con); $fsize += $clen; fwrite($fout, $con, $clen); } } // remove the deflate filter stream_filter_remove($fltr); // write the CRC32 value // hash_final is a string, not an integer $crc = hash_final($hctx, TRUE); // need to reverse the hash_final string so it's little endian fwrite($fout, $crc[3].$crc[2].$crc[1].$crc[0], 4); // write the original uncompressed file size fwrite($fout, pack("V", $fsize), 4); fclose($fout); } fclose($fin); } ?> ---- Server IP: 66.207.199.35 Probable Submitter: 199.212.18.131 ---- Manual Page -- http://www.php.net/manual/en/function.gzopen.php Edit -- https://master.php.net/note/edit/105676 Del: integrated -- https://master.php.net/note/delete/105676/integrated Del: useless -- https://master.php.net/note/delete/105676/useless Del: bad code -- https://master.php.net/note/delete/105676/bad+code Del: spam -- https://master.php.net/note/delete/105676/spam Del: non-english -- https://master.php.net/note/delete/105676/non-english Del: in docs -- https://master.php.net/note/delete/105676/in+docs Del: other reasons-- https://master.php.net/note/delete/105676 Reject -- https://master.php.net/note/reject/105676 Search -- https://master.php.net/manage/user-notes.php