(PHP 8 >= 8.1.0)
Enumerations are a restricting layer on top of classes and class constants, intended to provide a way to define a closed set of possible values for a type.
<?php
enum Suit
{
case Hearts;
case Diamonds;
case Clubs;
case Spades;
}
function do_stuff(Suit $s)
{
// ...
}
do_stuff(Suit::Spades);
?>For a full discussion, see the Enumerations chapter.
https://gist.github.com/esdras-schonevald/71a6730e6191c5e9c053e2f65b839eec
<?php
declare(strict_types=1);
/**
* This is a sample
* How to use Enum to create a custom exception cases
* PHP 8.1^
*/
enum MyExceptionCase {
case InvalidMethod;
case InvalidProperty;
case Timeout;
}
class MyException extends Exception {
function __construct(private MyExceptionCase $case){
match($case){
MyExceptionCase::InvalidMethod => parent::__construct("Bad Request - Invalid Method", 400),
MyExceptionCase::InvalidProperty => parent::__construct("Bad Request - Invalid Property", 400),
MyExceptionCase::Timeout => parent::__construct("Bad Request - Timeout", 400)
};
}
}
// Testing my custom exception class
try {
throw new MyException(MyExceptionCase::InvalidMethod);
} catch (MyException $myE) {
echo $myE->getMessage(); // Bad Request - Invalid Method
}