php static class



reportezvous à ces pages pour plus d'informations sur la signification de static. le fait de déclarer des propriétés ou des méthodes comme statiques vous permet d'y accéder sans avoir besoin d'instancier la classe. on ne peut accéder à une propriété déclarée comme statique avec l'objet instancié d'une classe (bien que  you can have static classes in php but they don't call the constructor automatically (if you try and call self::__construct() you'll get an error). therefore you'd have to create an initialize() function and call it in each method: <?php class hello { private static $greeting = 'hello'; private static $initialized = false;  the static instance of a class only happens once, and its variables are available to any instance of the class. instances have their own individual values which are not accessible to other instances, except where they are marked static . instances are useful when there will be more than one instance of the class.

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another consequence is that a static method cannot access nonstatic variables and methods, since these require an instance of the class. in a previous chapter, we wrote a user class. let's expand it with some static functionality, to see what the fuzz is all about: <?php class user { public $name; public $age; public static  s paypal.me/jream join forum jream/forum static methods(functions) are called from since a class can be instantiated more than once, it means that the values it holds, are unique to the instance/object and not the class itself. this also means that you can't use methods or variables on a class without instantiating it first, but there is an exception to this rule. both variables and methods on a 

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introduction to php static methods and static properties. sometimes, it is useful if we can access methods and properties in the context of a class rather than an object. to do this, you can use static keyword. to add a static method to a class, you use the static keyword as follows:  mai that is the question! i'm redoing some legacy php code and converting a lot of it from procedural to oop. i've written a few classes that are needed by lots of other classes, like database, config and prefs classes. but these classes only need to be instantiated or "initialized" once, but accessible to all  . . . <?php. class animal. {. public static $name = "animal" ;. return the class that is represented by "self::". public function getselfclass(). {. return get_class();. } return the class that is represented by "static::". public function getstaticclass(). {. return get_called_class();. } public function selfvar(). static classes, singletons, and dependency injection are all solving the same problem: letting code access code i've configured and written elsewhere. in other languages, this may be more about accessing the same object in memory for php that's pretty much irrelevant. nearly all php is executed on 

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