[wp-trac] [WordPress Trac] #37040: Enhancement: new function to validate a transient exists, and isn't expired without extra query

[WordPress Trac]

#37040: Enhancement: new function to validate a transient exists, and isn't expired
without extra query
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 Reporter:  danieliser          |      Owner:
     Type:  enhancement         |     Status:  new
 Priority:  normal              |  Milestone:  Awaiting Review
Component:  Options, Meta APIs  |    Version:  trunk
 Severity:  normal              |   Keywords:
  Focuses:  performance         |
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 Currently calling get_transient makes 2 queries, the first to validate if
 the transient exists & is not expired, the second to get the transient
 value.

 I propose creating a new function that does the job of the first query
 only. It should validate that the transient exists and hasn't expired
 returning a boolean.

 The get_transient should then be modified to call that function rather
 than get_option.

 The purpose here is to allow plugin / theme developers to minimize queries
 even further.

 Example: If all I need to do is check for a valid transient that only
 requires 1 query, I don't always need the value, just need to know whether
 it should be refreshed.

 In that case I could call valid_transient( 'transient' ).

 Since that value can be cached if I later need the full value then only
 one additional query would be needed.

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Ticket URL: <https://core.trac.wordpress.org/ticket/37040>
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