php - Update value in field to timestamp -

i have database have table (post) have field (time_post) old value in time_post real number (1443191344) want update formula (0000-00-00 00:00:00) know should use method from_unixtime() in command

but don't have right way command in mysql

note :

1443191344 0000-00-00 00:00:00

thanks