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<?php $value = '2010-10-21 54:254'; //$pattern = '(\d{4}(-\d{2})?(-\d{2})?( \d{2})?(:\d{2})?(:\d{2})?)'; $pattern = '^[(\d{4}-\d{2}-\d{2} \d{2}:\d{2}(:\d{2})?)]+$'; var_dump(preg_match('/' . $pattern . '/', $value));

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32.7 ms | 402 KiB | 5 Q