PHP – Static Properties Static properties can be called directly – without creating an instance of a class. Static properties are declared with the static keyword: Syntax <?php class ClassName { public static $staticProp = “iampsp”; } ?> To…
PHP – Static Methods Static methods can be called directly – without creating an instance of the class first. Static methods are declared with the static keyword: Syntax <?php class ClassName { public static function staticMethod() { echo…
PHP – What are Traits? PHP only supports single inheritance: a child class can inherit only from one single parent. So, what if a class needs to inherit multiple behaviors? OOP traits solve this problem. Traits are used to declare…
PHP – What are Interfaces? Interfaces allow you to specify what methods a class should implement. Interfaces make it easy to use a variety of different classes in the same way. When one or more classes use the same interface,…
PHP – What are Abstract Classes and Methods? Abstract classes and methods are when the parent class has a named method, but need its child class(es) to fill out the tasks. An abstract class is a class that contains at…
PHP – Class Constants Class constants can be useful if you need to define some constant data within a class. A class constant is declared inside a class with the const keyword. A constant cannot be changed once it is…
PHP – What is Inheritance? Inheritance in OOP = When a class derives from another class. The child class will inherit all the public and protected properties and methods from the parent class. In addition, it can have its own…
PHP – Access Modifiers Properties and methods can have access modifiers which control where they can be accessed. There are three access modifiers: public – the property or method can be accessed from everywhere. This is default protected – the…
PHP – The __destruct Function A destructor is called when the object is destructed or the script is stopped or exited. If you create a __destruct() function, PHP will automatically call this function at the end of the script. Notice…
