What is the usage of traits in PHP?

Trait is a mechanism in PHP for reusing code, allowing developers to combine a collection of methods into a class without using inheritance. Traits can be used by multiple classes, similar to a concept of horizontal inheritance, avoiding the limitations of single inheritance for classes.

Here is how Trait is used:

1. characteristic
2. utilize
3. The methods in Trait can be directly used in a class, just like the methods defined in the class.

Trait’s usage scenarios include:

1. Code reuse: when multiple classes need to reuse the same method, you can place these methods in a Trait and then use the Trait in those classes to avoid redundant code.
2. Combining functions: Traits can be used to combine different functionalities by encapsulating each function into its own trait, and then introducing the corresponding traits into the desired class to achieve functional composition.

It is important to note that Traits cannot be instantiated and can only be used by being introduced into a class. Additionally, methods in Traits have the same priority as methods in classes, so if a method in a Trait has the same name as a method in a class, the method in the class will override the method in the Trait.