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Bug #74224 output_add_rewrite_var always starts a new output buffer
Submitted: 2017-03-08 13:47 UTC Modified: 2018-06-14 10:35 UTC
Votes:1
Avg. Score:4.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:0 (0.0%)
From: bernd dot jaenichen at questback dot com Assigned:
Status: Wont fix Package: Output Control
PHP Version: 5.6.30 OS: openSUSE 13.2 (i586)
Private report: No CVE-ID: None
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 [2017-03-08 13:47 UTC] bernd dot jaenichen at questback dot com
Description:
------------
---
From manual page: http://www.php.net/function.output-add-rewrite-var
---

If ob_start() has already been called and output_add_rewrite_var() is called after that it leads to ob_get_level() == 2.

Manual states that this should be the case only if no buffering is active.

Bug is reproducable in CLI as well as CGI mode.

Test script:
---------------
<?PHP
ob_start();

echo "Fill buffer\n";

output_add_rewrite_var('someParam', 1);

echo "Level: " . ob_get_level() . "\n";

echo ob_get_clean();


Expected result:
----------------
Fill buffer
Level: 1


Actual result:
--------------
Fill buffer
Level: 2


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 [2017-09-14 17:59 UTC] cmb@php.net
According to <https://3v4l.org/oIpdo>, the behavior has been
changed as of PHP 5.4.0 which may have been done deliberately, in
which case this would be a documentation problem.
 [2018-06-14 10:35 UTC] mike@php.net
-Status: Open +Status: Wont fix
 [2018-06-14 10:35 UTC] mike@php.net
You said:

> Manual states that this should be the case only if no buffering is active.

Did you mean this note from the manual?

>> Note: Calling this function will implicitly start output buffering if it is not active already. 

You're right, it could be interpreted that way. 
Unfortunately I didn't interpret it that way 10 years ago when rewriting the output layer.
 
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