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Enumeration static methods

Enumerations may also have static methods. The use for static methods on the enumeration itself is primarily for alternative constructors. E.g.:

<?php
enum Size
{
    case 
Small;
    case 
Medium;
    case 
Large;

    public static function 
fromLength(int $cm): static
    {
        return 
match(true) {
            
$cm 50 => static::Small,
            
$cm 100 => static::Medium,
            default => static::
Large,
        };
    }
}
?>

Static methods may be public, private, or protected, although in practice private and protected are equivalent as inheritance is not allowed.

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