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<?php |
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declare(strict_types=1); |
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namespace Stadly\Date; |
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use DateInterval; |
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final class Interval |
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{ |
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/** |
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* @param DateInterval $a First date interval to compare. |
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* @param DateInterval $b Second date interval to compare. |
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* @return int|null 0 if $a == $b, < 0 if $a < b, > 0 if $a > $b, null if undetermined. |
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*/ |
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44 |
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public static function compare(DateInterval $a, DateInterval $b): ?int |
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{ |
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$aSeconds = self::getSecondsInInterval($a); |
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44 |
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$aMonths = self::getMonthsInInterval($a); |
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$bSeconds = self::getSecondsInInterval($b); |
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$bMonths = self::getMonthsInInterval($b); |
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$minSecondsPerMonth = 28 * 24 * 60 * 60; |
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$maxSecondsPerMonth = 31 * 24 * 60 * 60; |
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if ($aSeconds === $bSeconds || $aMonths === $bMonths) { |
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return $aSeconds + $aMonths <=> $bSeconds + $bMonths; |
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} |
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if ($aSeconds + $maxSecondsPerMonth * $aMonths < $bSeconds + $minSecondsPerMonth * $bMonths) { |
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return -1; |
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} |
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if ($bSeconds + $maxSecondsPerMonth * $bMonths < $aSeconds + $minSecondsPerMonth * $aMonths) { |
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return 1; |
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} |
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return null; |
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} |
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/** |
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* @param DateInterval $interval Date interval. |
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* @return int Number of months in the date interval. |
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*/ |
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private static function getMonthsInInterval(DateInterval $interval): int |
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{ |
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$years = $interval->y; |
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$months = $years * 12 + $interval->m; |
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if ($interval->invert === 1) { |
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return -$months; |
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} |
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return $months; |
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} |
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/** |
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* @param DateInterval $interval Date interval. |
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* @return float Number of seconds in the date interval. |
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*/ |
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private static function getSecondsInInterval(DateInterval $interval): float |
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{ |
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$days = $interval->d; |
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$hours = $days * 24 + $interval->h; |
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$minutes = $hours * 60 + $interval->i; |
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$seconds = $minutes * 60 + $interval->s + $interval->f; |
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if ($interval->invert === 1) { |
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15 |
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return -$seconds; |
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} |
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return $seconds; |
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} |
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} |
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Stadly /
PhpDate
