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<?php $x = new DateTime('2012-02-17'); $y = clone $x; $y->modify('last day of this month'); echo $x->format('d') . "\n"; echo $y->format('d') . "\n"; echo $y->format('d') - $x->format('d');
Output for 7.2.0 - 7.2.33, 7.3.0 - 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
17 29 12

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142.76 ms | 407 KiB | 5 Q