When PHP is running on CLI, strtotime('2016-9-22 59:59:59') cannot return the timestamp.

When PHP is running on CLI, strtotime('2016-9-22 59:59:59') cannot return the timestamp, but this time is obviously correct???

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When PHP is running on CLI, strtotime('2016-9-22 59:59:59') cannot return the timestamp, but this time is obviously correct???

<code>$ php -r "var_dump(strtotime('2016-9-22 59:59:59'));"
bool(false)</code>

When the time format is illegal and returned, the strtotime function returns false. 59 points here. . .

Before

php5.1.0, an error returned -1.