(PHP 8 >= 8.1.0)
enum_exists — Checks if the enum has been defined
$enum, bool $autoload = true): boolThis function checks whether or not the given enum has been defined.
enumThe enum name. The name is matched in a case-insensitive manner.
autoloadWhether to call __autoload by default.
Returns true if enum is a defined enum,
false otherwise.
Example #1 enum_exists() example
<?php
// Check that the enum exists before trying to use it
if (enum_exists(Suit::class)) {
$myclass = Suit::Hearts;
}
?>