datetime - Should I Calculate Time Values or Declare Them At The Start of My Code? -

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tl;dr: whats better?

cookie_expires = time()+( (60*60*24)*31 )

vs.

cookie_expires = seconds_month

to save time , typing, years have been declaring useful time values @ start of apps.

seconds_hour = 3600 seconds_day = 86400 seconds_week = 604800 seconds_month = 2678400 seconds_year = 31557600

i wondering gurus here think. should not waste effort , calculate needed?

in opinion readability goes first:

"one_week_in_seconds" way better 60*60*24*7!


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