28 lines
797 B
PHP
28 lines
797 B
PHP
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<?php
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namespace Misuzu;
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final class DateCheck {
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public static function isLeapYear(int $year): bool {
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return (($year % 4) === 0 && ($year % 100) !== 0)
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|| ($year % 400) === 0;
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}
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// i realise this implementation is probably horribly naive,
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// but for what i need it will Do the Job
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public static function isValidDate(int $year, int $month, int $day): bool {
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if($month < 1 || $month > 12)
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return false;
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if($day < 1 || $day > 31)
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return false;
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if($month === 2)
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$days = $year === 0 || self::isLeapYear($year) ? 29 : 28;
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elseif($month === 4 || $month === 6 || $month === 9 || $month === 11)
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$days = 30;
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else
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$days = 31;
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return $day <= $days;
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}
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}
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