[PHP] Output Buffering and zlib Compression Issue

[Chris]

When I run the following code (PHP 5.2.2, 5.2.3) via Apache (with an  
htaccess file), I get this error:


Notice: ob_end_clean() [ref.outcontrol]: failed to delete buffer zlib  
output compression. in ...


Can anyone explain what's going on?

I'm assuming it isn't a bug and I've read the documentation. Did I  
miss something?



htaccess file code:

php_flag output_buffering Off
php_flag zlib.output_compression On
php_value zlib.output_compression_level -1


PHP Code:

?php

error_reporting(E_ALL | E_NOTICE);
ini_set('display_errors', '1');

ob_start();

echo You shouldn't see this.;

while (ob_get_level()  0) {
ob_end_clean();
}

ob_start();

echo You SHOULD see this.;

ob_end_flush();

?

Chris




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RE: [PHP] Output Buffering and zlib Compression Issue

[Jan Reiter]

Hi! 

I'm not quite sure what you are trying to do ... 
Why do you use output buffering in your code, when you turn it off in the
htaccess directive??
php_flag output_buffering Off

The code worked for me. But I tested it without your htaccess settings ... 

Jan

-Ursprüngliche Nachricht-
Von: Chris [mailto:[EMAIL PROTECTED] 
Gesendet: Samstag, 4. August 2007 01:18
An: php-general@lists.php.net
Betreff: [PHP] Output Buffering and zlib Compression Issue

When I run the following code (PHP 5.2.2, 5.2.3) via Apache (with an  
htaccess file), I get this error:

Notice: ob_end_clean() [ref.outcontrol]: failed to delete buffer zlib  
output compression. in ...

Can anyone explain what's going on?

I'm assuming it isn't a bug and I've read the documentation. Did I  
miss something?


htaccess file code:

php_flag output_buffering Off
php_flag zlib.output_compression On
php_value zlib.output_compression_level -1


PHP Code:

?php

error_reporting(E_ALL | E_NOTICE);
ini_set('display_errors', '1');

ob_start();

echo You shouldn't see this.;

while (ob_get_level()  0) {
 ob_end_clean();
}

ob_start();

echo You SHOULD see this.;

ob_end_flush();

?

Chris




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RE: [PHP] Output Buffering and zlib Compression Issue

[Jan Reiter]

Right! 

With zlib compression ob_start() or similar seems to get called before the
user 
script execution. I'm not quite sure why. Anyhow ob_get_level() returns 2
after 
the ob_start() is called for the first time in the script. You can avoid the
error 
with

while (ob_get_level()  1) {
ob_end_clean();
}

but it won't kill the buffer containing output before ob_start() is called. 

ob_end_clean();
ob_end_clean();

will reproduce your error, too. This leads to the assumption, that it is an
issue
of advancing the functions internal process pointer.

Same reason why 

$data1 = mysql_fetch_assoc($resultid);
$data2 = mysql_fetch_assoc($resultid);

won't lead to the desired effect either, but 

While($data = mysql_fetch_assoc($resultid)){...}

does, as does

while (@ob_end_clean());

It seems only this way of accessing the buffers allows deleting the
lowermost buffer created before
Script execution.

Jan


-Original Message-
From: Chris [mailto:[EMAIL PROTECTED] 
Sent: Saturday, August 04, 2007 3:25 AM
To: php-general@lists.php.net
Subject: [PHP] Re: Output Buffering and zlib Compression Issue

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