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<?php function is_leap_year(int $year) { return $year % 4 == 0 and ($year % 100 != 0 or $year % 400 == 0); } $year = 2016; var_dump(is_leap_year($year) === date('L', $year)); # true $year = 2018; var_dump(is_leap_year($year) === date('L', $year)); # false
Output for git.master, git.master_jit, rfc.property-hooks
bool(false) bool(false)

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