To be sure that the umask setting takes effect please use a simple test and do not use any other web application for this. It might be the case that these application change the rights independently from the umask setting of Apache.
Simple test PHP script:
<?php
if ($fp = fopen(time() . '.txt', 'w')) {
fwrite($fp, 'This is a simple test.');
fclose($fp);
echo "done";
} else {
echo "error - cannot create file";
}
?>
Take care that the user www-data has write access to the folder where you have installed this simple test file.
To have the new umask running, check if the file /etc/apache2/envvars will be used within your Apache start file /etc/init.d/apache2 :
...
PIDFILE=$(. /etc/apache2/envvars && echo $APACHE_PID_FILE)
...
Set your umask in /etc/apache2/envvars :
...
# umask 002 to create files with 0664 and folders with 0775
umask 002
Restart your Apache :
service apache2 restart
Check the difference :
#> ls -l *.txt
-rw-rw-r-- 1 www-data www-data 14 2012-05-01 15:56 1335880583.txt
-rw-r--r-- 1 www-data www-data 14 2012-05-01 15:55 1335880540.txt