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<?php $a = new DateTime('2015-10-10'); $b = new DateTime('2015-10-15'); $m = new DateInterval('P10D'); var_dump($m->days); var_dump($a->diff($b)->days); var_dump($a->diff($b)->days > $m->days);
Output for 5.4.20 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
bool(false) int(5) bool(true)
Output for 5.4.2 - 5.4.19
int(-99999) int(5) bool(true)

preferences:
151.6 ms | 407 KiB | 5 Q