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run code in 300+ PHP versions simultaneously
<?php $str = '2019-12-15T17:51:38.948471000Z'; var_dump(strtotime($str));
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.24, 7.4.0 - 7.4.12, 8.0.0
bool(false)