zlib.output_compression and images

[tux0r]

Is it possible to
turn off zlib.output_compression within php script, so that we could
manually decide which browsers get gzipped data?

old 4.x netscape have problems displaying php generated images when zlib.output_compression is on.

---

using php 4.1.2, apache 1.3.24, gd 2.0, zlib 1.1.4 and lotsof other stuff

[van__]

<?

if ($mycondition) {
ini_set(zlib.output_compression,0);
}

?>

[tux0r]

hmm, ini_set, ini_get and ini_alter works with all other options (e.g. upload_max_filesize), but not with zlib.output_compression. i checked the list of Configuration options from zend (http://www.zend.com/manual/function.ini-set.php), and zlib is not on this list.

Only get_cfg_var() is able to show that zlib.output_compression is On. But there's no set_cfg_var() so this don't help... 🙂

have anybody tested this with 4.2.0?

[van__]

did you try it with quotes?
ini_set('zlib.output_compression',0);

Just because it's not in the list doesn't mean it wont work. The session features wok the same way, their not in the list but you can control them with ini_set.

No I haven't tried this particular option, but... you should be able to test it in say 30 seconds.

[tux0r]

yes, tested with both " " and '', but it did not help. it still gzipped everything. output_buffering and output_handler is so called PHP_INI_SYSTEM Changeable options, and can not be changed in user scripts. maybe zlib.output_compression works the same way...

[van__]

Well then you'll have to turn off automatic OB in your ini and just call it like so:

if ($mycondition) {
//start OB without gzipping for funky browsers
ob_start();
} else {
//gzip for all others
ob_start("ob_gzhandler");
}