[SOLVED] Apache + PHP + XDEBUG profiler refuses to write any files

Dave Cohen · 2013-11-26 01:52:08

I'm trying to track down some performance problems and the xdebug profiler seems like the tool to use. Unfortunately no matter what I try xdebug simply will not write an output file.

I've searched these forums, and stackoverflow, and tried all suggestions. Nothing helps. No errors in log file.

I've made a directory, /tmp/xdebug, owned by user http and with proper permissions.

I've configured PHP with xdebug profiling enabled. When I browse phpinfo via the web server, I see these settings for xdebug:

xdebug.profiler_aggregate	Off	Off
xdebug.profiler_append	Off	Off
xdebug.profiler_enable	On	On
xdebug.profiler_enable_trigger	Off	Off
xdebug.profiler_output_dir	/tmp/xdebug	/tmp/xdebug
xdebug.profiler_output_name	xdebug_profile.out.%t-%R	xdebug_profile.out.%t-%R

Other features of xdebug work fine. For example, using emacs and geben I can place breakpoints, step through code, etc...

When I run php from the command line, I get the profile files written as expected. For example:

dave@apollo ~ % sudo -u http php -r "echo 1;"                                                                                                                                                                                                                                       
1%                                                                                                                                                                                                                                                                                   
 
dave@apollo ~ % ls -lthr /tmp/xdebug                                                                                                                                                                                                                                                
total 4.0K
-rw-r--r-- 1 http http 146 Nov 25 17:49 xdebug_profile.out.1385430597-

That shows that user http can write to the directory. And shows that PHP is configured to dump the files. However no matter how I request a page from apache, nothing is written. I'm completely at a loss. Any help is appreciated.

Last edited by Dave Cohen (2014-02-23 18:20:10)

MarSoft · 2014-02-23 15:28:13

Hello.
Just encountered the same problem. After long research it turned out that here in Arch https is launched with PrivateTmp=True. This means that when such process (including any its child, and including PHP and its library XDebug) tries to open "/tmp/*", it gets redirected to "/tmp/systemd-private-??????/tmp/*", also "/var/tmp/*" redirects to "/var/tmp/systemd-private-??????/tmp/*". So any directory you create in /tmp/ will not be used.
So the solution to this problem will be to use some path outside of /tmp, e.g. /srv/xdebug, or /var/log/xdebug, or anything. Make sure to create that directory and make it writeable for http user.
Also check your php.ini and ensure that you either have open_basedir disabled or that it includes your profiler_output_dir.

Last edited by MarSoft (2014-02-23 15:36:15)

Dave Cohen · 2014-02-23 18:20:36

That was it! Thanks for posting.

JeanCarloMachado · 2015-05-29 01:59:12

Changing permissions worked for me. Thanks.

ewaller · 2015-05-29 02:14:20

Two people agreeing. Year old thread.

I guess it is safe to close.

Arch Linux

#1 2013-11-26 01:52:08

[SOLVED] Apache + PHP + XDEBUG profiler refuses to write any files

#2 2014-02-23 15:28:13

Re: [SOLVED] Apache + PHP + XDEBUG profiler refuses to write any files

#3 2014-02-23 18:20:36

Re: [SOLVED] Apache + PHP + XDEBUG profiler refuses to write any files

#4 2015-05-29 01:59:12

Re: [SOLVED] Apache + PHP + XDEBUG profiler refuses to write any files

#5 2015-05-29 02:14:20

Re: [SOLVED] Apache + PHP + XDEBUG profiler refuses to write any files

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