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<?php declare(strict_types=1); error_reporting(E_ALL); $month99IsValid = is_int(strtotime('2010-99-01')); $month100IsValid = is_int(strtotime('2010-100-01')); var_dump($month99IsValid); var_dump($month100IsValid);
Output for 8.1.7 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
bool(false) bool(true)
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.6
bool(false) bool(false)
preferences:
108.76 ms | 402 KiB | 123 Q