PHP scope-scoped Fu Di colon:: Usage _php Tutorial

The double-colon operator, the scope-scoped operator, scope Resolution operator can access properties and methods overridden in static, const, and class.

Used outside of the class definition, called with the class name. In PHP 5.3.0, you can use variables instead of class names.

Program List: Accessing the class definition externally with a variable

Program List: Used outside the class definition::

Program Run Result:

Fruit Color Red

Program List: Calling the parent method

  
 
  Showcolor ();? >

Program Run Result:

Fruit::showcolor () Apple::showcolor ()

Program List: Using scope qualifiers

  
 
  color;        }    }    Class Banana    {public        $color;        Public function __construct ()        {            $this->color = ' Banana is yellow ';        }        Public Function GetColor ()        {            return apple::showcolor ();        }    }    $banana = new Banana;    echo $banana->getcolor ();? >

Program Run Result:

Banana is yellow

Program List: Methods for calling base classes

Program Run Result:

Show Color

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