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<?php $types =[ \DateTimeInterface::class, \DateInterval::class ]; $typeClass = \DateTimeImmutable::class; foreach ($types as $type) { if (is_a($typeClass, $type, true)) { printf("%s is a %s", $typeClass, $type); } else { printf("%s is not a %s", $typeClass, $type); } print \PHP_EOL; }
Output for git.master, git.master_jit, rfc.property-hooks
DateTimeImmutable is a DateTimeInterface DateTimeImmutable is not a DateInterval

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