Setting Limit Upload PHPMyAdmin

Find the file called: php.ini on your server and follow below steps

With apache2 and php5 installed you need to make three changes in the php.ini file. First open the file for editing, e.g.:

sudo gedit /etc/php5/apache2/php.ini

OR

sudo gedit /etc/php/7.0/apache2/php.ini

Next, search for the post_max_size entry, and enter a larger number than the size of your database (15M in this case), for example:

post_max_size = 25M

Next edit the entry for memory_limit and give it a larger value than the one given to post_max_size.

Then ensure the value of upload_max_filesize is smaller than post_max_size.

The order from biggest to smallest should be:

    memory_limit
    post_max_size
    upload_max_filesize

After saving the file, restart apache (e.g. sudo /etc/init.d/apache2 restart) and you are set.

Don't forget to Restart Apache Services for changes to be applied.

You can change the owner of file once and then make changes to it as you do to any other file you own. You need to run:

sudo chown user /path/to/your/file/php.ini

Where user is your username.

To make sure any user on system can read (but not edit it):

chmod 644 /path/to/your/file/php.ini

Sumber: https://stackoverflow.com/questions/3958615/import-file-size-limit-in-phpmyadmin