ID: 48994 Comment by: apinstein at mac dot com Reported By: jflatnes at vt dot edu Status: Assigned Bug Type: Zlib Related Operating System: Linux 2.6.29 PHP Version: 5.2.10 Assigned To: jani New Comment:
I ran into this issue today as well... but I have more to add. Using PHP 5.3 + zlib 1.2.3 I *cannot* get compression + headers. I can get no compression, or compression w/o headers, but never "working" compression+headers. I have tried: httpd.conf: php_flag zlib.output_compression On php_admin_flag zlib.output_compression On -> zip + no headers php_flag zlib.output_compression true php_admin_flag zlib.output_compression true -> not zipped In app.php: ini_set('zlib.output_compression', true); ini_set('zlib.output_compression', "On"); -> not zipped Previous Comments: ------------------------------------------------------------------------ [2009-07-21 22:50:56] j...@php.net There is something weird going on here, verified it now. Need to investigate more tomorrow. To reproduce on command line: # HTTP_ACCEPT_ENCODING=gzip gdb --arg php-cgi test.php ------------------------------------------------------------------------ [2009-07-21 19:03:10] jflatnes at vt dot edu <?php var_dump(ini_set('zlib.output_compression', 'On')); ?> Results in: string(0) "" (meaning I had no previous setting for zlib.output_compression, I believe) --- I am coming to understand that the string 'On' doesn't behave the same way in ini_set as in an ini file, as mentioned. The issue I see here is that there are two options for zlib compression: zlib.output_compression = false: no compression with no headers. zlib.output_compression = true: compression with appropriate headers. Passing a string to ini_set (other than the string '1') causes a third, undocumented behavior: zlib.output_compression = 'On': compression without the headers. Those three states describe the behavior I'm seeing, and the third state seems like a bug. If 'On' is an invalid setting, shouldn't the compression simply not be activated? Am I thinking about this correctly?) ------------------------------------------------------------------------ [2009-07-21 18:46:33] j...@php.net Try this too: <?php var_dump(ini_set('zlib.output_compression', 'On')); ?> Also note that using "On" or "Off" or such with ini_set() does NOT work like they do when used in php.ini. ------------------------------------------------------------------------ [2009-07-21 02:48:18] jflatnes at vt dot edu Description: ------------ When the configuration option 'zlib.output_compression' is set to a boolean value, output is compressed and the appropriate HTTP headers are sent. When the option is set to a string like 'true' or 'On', the output is compressed, but no headers are sent, causing browsers to fail to interpret the output as compressed. Reproduce code: --------------- <?php ini_set('zlib.output_compression', 'On'); echo 'hello, world'; ?> Expected result: ---------------- The output "hello, world" to be gzip/deflate compressed as appropriate for Accept-Encoding, and the Content-Encoding and Vary HTTP headers to be set. Actual result: -------------- Instead, the output is indeed gzip-compressed, but the Content-Encoding and Vary headers are not set. The actual text that the browser prints is: ������ÊHÍÉÉ×Q(Ï/ÊI���ÿÿ�:r«ÿ ��� Note, this works correctly with the an ini_set argument of the boolean value true. The documentation claims that ini_set should take string arguments, though. Even if a boolean/integer is required to activate output compression, the behavior should either be "all on" or "all off". ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=48994&edit=1