Add and update PHPDoc.

Signed-off-by: Hugues Peccatte <hugues.peccatte@gmail.com>
Remove unused local variables.

Signed-off-by: Hugues Peccatte <hugues.peccatte@gmail.com>
Fix PHPCS issues.

Signed-off-by: Hugues Peccatte <hugues.peccatte@gmail.com>
Merge branch 'master' of https://github.com/phpmyadmin/phpmyadmin