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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 git.master, git.master_jit, rfc.property-hooks
bool(false) bool(true)

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