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<?php date_default_timezone_set('Asia/Shanghai'); $date = date('Y-m-d_H-i-s', time()); var_dump($date);
Output for 5.5.0 - 5.5.37, 5.6.0 - 5.6.8, 5.6.10 - 5.6.28, 7.0.1 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.6
string(19) "2015-12-21_15-41-15"
Output for 5.6.9, 7.0.0
string(19) "2015-12-21_15-41-16"

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