php.ini changes, but not effective on Ubuntu

Question 1

I want change the limit of PHP upload file's size

And this is some information of the output my phpinfo:

Configuration File (php.ini) Path    /etc/php5/apache2
Loaded Configuration File    /etc/php5/apache2/php.ini

And this is the content of my php.ini file:

upload_max_filesize = 50M
post_max_size = 50M
memory_limit = 128M

Then I restart Apache 2, but the phpinfo shown is still:

upload_max_filesize    2M

Question 2

I have solved my question.

There is a syntax error in php.ini in line 109, so the next all syntax does not execute.

Question