PHP gets the current class name function name method

__function__ function name (PHP 4.3.0 new). From PHP 5 This constant returns the name (case-sensitive) of the function when it is defined. This value is always lowercase in PHP 4.
The name of the __class__ class (PHP 4.3.0 new). From PHP 5 This constant returns the name of the class when it is defined (case-sensitive). This value is always lowercase in PHP 4.
The method name of the __method__ class (PHP 5.0.0 new). Returns the name (case-sensitive) of the method when it is defined.

Note: These constants are preceded by two underscores.

Get_class (class name);//Gets the class name of the class where the current statement is located
Get_class_methods (class name),//Gets all method names of class name classes, and composes an array
Get_class_vars (class name);//gets all the lighter names of class name classes and makes up an array