Can someone explain why wordpress uses two column for storing time values?
Domanda
I see two table columns in wordpress tables for time values.
Examples:
post_date
post_date_gmt
post_modified
post_modified_gmt
comment_date
comment_date_gmt
What is the reason behind storing different time types?
Soluzione
The post_date
is the post_date_gmt
after the Timezone value (in Settings) has been applied.
So, if you like, the reasoning is that there's a standard time for everybody, and then your own site's time depending on your Settings, so say you want to change that later, the standard time is always left untouched.
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