According to
this comment on the PHP manual pages, the
tmpfile() function is affected by the
open_basedir setting.
Quoting from the mentioned comment about
tmpfile():
Quote:
Remember, that open_basedir affects this function. You will get an error:
Warning: tmpfile() [function.tmpfile]: open_basedir restriction in effect. File(/var/tmp) is not within the allowed path(s): ....blablabla =)
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Ok, I decided to test, so I altered my php.ini adding this restriction:
Code:
open_basedir = D:\htdocs
After restarting php, I checked with
phpinfo() that the
open_basedir was in effect, it was...
Fine, then lets try to run this script which should produce the mentioned warning message since my
TEMP directory,
"C:\Windows\Temp", (as shown in
phpinfo()) is now outside the
open_basedir, and I would then not expect
tmpfile() to be working.
PHP Code:
$temp = tmpfile();
fwrite($temp, "writing to tempfile");
fseek($temp, 0);
echo 'x:'.fread($temp, 1024);
sleep(10); // sleep 10 seconds
(According to the PHP documentation the temporary file created by
tmpfile() will automatically be deleted again when the script ends so
sleep(10) was added so I could check whether the temporary file was created or not while the script was running.)
Now comes the weird part... Strangely, I get absolutely no warning message when running the above script. On the contrary,
tmpfile() seems to be totally unaffected by the
open_basedir setting! And when I look in
"C:\Windows\Temp" I indeed see the a file
phpX.tmp appear and vanish when the script starts and stops. But
"C:\Windows\Temp" is not within
"D:\htdocs" which I has set as the
open_basedir restriction and where the script is running.
My question is therefore:
When is tmpfile() restricted by open_basedir, and when not?
Environment: PHP 5.2.6 / Apache / Microsoft Windows Server 2003
If it is of interest, the reason for the above question is that I am trying to figure out why some users are having trouble with the PEAR
Spreadsheet_Excel_Writer on some hosts.
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