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<?php $d1 = new DateTime("2009-09-01"); $d2 = new DateTime("2010-05-01"); var_dump($d1->diff($d2)->m); // int(4) var_dump($d1->diff($d2)->m + ($d1->diff($d2)->y*12)); // int(8)
Output for 7.3.32 - 7.3.33, 8.0.13, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
int(8) int(8)
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30
int(7) int(7)

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227 ms | 404 KiB | 377 Q