Error PHP.SQL.SQLException: Access denied for user 'root'@'localhost' (with password: NO), how can I resolve this?

[Jasper]

Hi everyone, I have a small question, a special case, error php.sql.sqlexception: access denied for user 'root'@'localhost' (with password: no), how can i resolve this? Thank you give me your opinion as soon as possible, thank you in advance.