abstract php



abstract class abstractclass { force les classes filles à définir cette méthode abstract protected function getvalue(); abstract protected function prefixvalue($prefix); méthode commune public function printout() { print $this>getvalue() . "\n"; } } class concreteclass extends abstractclass { protected function getvalue() { abstract class can be used some what like an interface in php. so basically we can implement class using abstract. we can't extend more than once abstract class. see the chapter on class abstraction in the php manual: php introduces abstract classes and methods. classes defined as abstract may not be instantiated, and any class that contains at least one abstract method must also be abstract. methods defined as abstract simply declare the method's signature 

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<?php abstract class test{ force extending class to define this method abstract protected function getvalue(); abstract protected function prefixvalue($prefix); common method public function printout() { print $this>getvalue() . "\n"; } } class testabs extends test{ protected function getvalue() { } this  seules les fonctions membres de votre classe abstraite peuvent être abstraites, jamais les propriétés ! une classe abstraite ne s'instancie pas ! si d'aventure vous tentez d'instancier etrevivant, voici ce qui va vous arriver : php fatal error: cannot instantiate abstract class etrevivant. si ma classe abstraite  you will learn about the php abstract class and abstract method, and how to use abstract class to define a framework for the class hierarchy.

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a php abstract class is pretty much identical to an interface expect that in addition to declaring methods and properties that the child class must define, you can define methods and properties in the abstract class. so if there was some abstract abstract factory in php. back to abstract factory description. in the abstract factory pattern, an abstract factory defines what objects the nonabstract or concrete factory will need to be able to create. the concrete factory must create the correct objects for it's context, insuring that all objects created by the concrete factory  mai the improved object model in php makes developing applications using oop much easier and gives you the programmer, greater flexibility. <?php. define a new abstract class for all 'shapes' to extend. abstract class shape {. define the methods required for classes to extend. the abstract class. abstract protected function getcolor();. abstract protected function setcolor($color);. common function available to all classes extending the shape class.

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