PDO: ATTR_CLIENT_VERSION what does this double colon mean?

PDO: ATTR_CLIENT_VERSION what does this double colon mean? This post was last edited by lghyt at 12:34:45, January 6 ,.

These two symbols in the PHP class are dizzy.
PDO: ATTR_CLIENT_VERSION what does this double colon mean?

Reply to discussion (solution)

When accessing the member variables or methods in the PHP class, if the referenced variables or methods are declared as const (defining constants) or static (declaring static), use the operators ::,, otherwise, use the operator>.
In this case, you should understand it...

Is there such a description in the manual?
Scope resolution operator (::)

Sometimes, functions in the category class or functions and variables in the base class are very useful without declaring any instances. The operator is used in this case.