0000-00-00 00:00:00时间戳

strtotime('0000-00-00 00:00:00')   can you guess what happened?

in 32-bite it will return false

in 64-bite it will return a naviagte value

beacuse interge in 32-bite is not enough to count its range and return false, but if you use 640bit it will return a navigate value.

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