Backed Enums

Backed enums in PHP allow enum cases to have scalar values.
Each case is backed by either a string or integer.

This is useful when storing enum values in databases or APIs.

Example

enum Status: string {
    case Pending = 'pending';
    case Approved = 'approved';
    case Rejected = 'rejected';
}

$status = Status::Approved;

echo $status->value; // approved

Converting from value

$status = Status::from('approved');

var_dump($status === Status::Approved);

Safe conversion

$status = Status::tryFrom('unknown');

var_dump($status); // null