What does $ this-> db-> execute mean?

What does $ this-& gt; db-& gt; execute mean? $ this-> db-> execute means. what I know is that it executes SQL statements, who can tell me the specific meaning and what it can return?

Reply to discussion (solution)

What can the execute method of the db Class return? depends on the result returned by the execute method.

This is just a function that you reference the class. find this class and check its code. Otherwise, we do not know what function is in it.

$ This-> db-> execute

Call the execute method of the db class, depending on how the execute is defined and the db class directly.