Use PHP Traits Keyword Using OOPS

In this blog you will learn How to Use PHP Traits Keyword Using OOPS.

Basically trait is word use in biology. In php trait is method of code re-usability.As we know php is single inheritance programming language.As per my opinion main intention of introducing trait in php is to reduce limitation of code re-usability in PHP single inheritance nature.

PHP VERSION

PHP 5.0

2004 - Abstract classes and interfaces introduced

PHP 5.4

2012 - Traits introduced

Abstract Classes are in reality define things that are abstract e.g Vehicle is an abstract thing until or unless its materialized in the form of a car or a bike . Neither interface define it nor traits.

Interfaces compliment the class inheritance functionality where a class inherits from multiple classes(only certain languages provide multiple inheritance e.g C/C++). Interfaces , as names suggest focus on the INTERFACE , and not the implementation of the interface method in class which is implementing it. It makes classes PULG & PLAYABLE so everyone should follow a standard. If you further read about factory and adapter pattern on OOP you will understand it.

Traits have implementation/functionality that is not bound to specific classes.Instead it could be found across different classes. Its like a gene in genetics which stays mute in parents and appear only in certain children. Or to be concise selective inheritance but not bound to single class. So it provides a way much better code-reuse

Declaration of PHP Trait

trait test_trait
{

    public
    function traittestFunction()
  {
        echo "This is callable by your class object";
    }
}

Declaring class where traits will be used, 

class helloTest
{
    use test_trait;
}
$objTest = new helloTest();
$objTest - > traittestFunction();

Output:

This is callable by your class object.