The difference between PHP static and self

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PHP from the process to the now mature object-oriented system, in PHP object-oriented, static variable call We can use these two self::method and Static::method, but many children's shoes confused, do not understand Self::method and static:: What is the difference between method, here are two examples to see exactly:

Example 1:

1 classCar {2      Public Static functionmodel ()3     {4Self::Getmodel ();5     }6     protected Static functionGetmodel ()7     {8         Echo"This is a car model";9     }Ten } OneCar::model ();//This is a car model A Echo' <br/> '; - ClassTaxiextendsCar { -     protected Static functionGetmodel () the     { -         Echo"This is a Taxi model"; -     } - } +Taxi::model ();//This is a car model

Summary: Self::getmodel () calls Method Getmodel (), the method of the subclass Getmodel () does not actually mean that the parent class is overloaded with methods Getmodel ().

Example 2:

1 classCar {2      Public Static functionmodel ()3     {4         Static::Getmodel ();5     }6     protected Static functionGetmodel ()7     {8         Echo"This is a car model";9     }Ten } OneCar::model ();//This is a car model A Echo' <br/> '; - ClassTaxiextendsCar { -     protected Static functionGetmodel () the     { -         Echo"This is a Taxi model"; -     } - } +Taxi::model ();//This is a Taxi model

Summary: Self::getmodel () calls Method Getmodel (), the method of the subclass Getmodel () overloads the parent class's Method Getmodel ().

Children's shoes, do you understand?

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The difference between PHP static and self