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<?php $name = 'mickmackusa'; $yob = fn(?int $age): ?int => !$age ? null : ( fn($birthYear) => $birthYear * print "$name's birth year is $birthYear\n" )(date('Y') - $age); var_export($yob(null)); echo "\n---\n"; var_export($yob(31));
Output for git.master_jit, git.master
Warning: Module "Zend OPcache" is already loaded in Unknown on line 0 Warning: Zend OPcache: module registration failed! in Unknown on line 0 NULL --- mickmackusa's birth year is 1994 1994

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