string $selection )
Fires to announce the query’s current selection parameters.
For use by caching plugins.
The assembled selection query.
This action hook is executed prior to the query and is passed a string containing the assembled query. Note that this string is NOT passed by reference and manipulating this string will not affect the actual query. This is intended to be used primarily by caching plugins.
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do_action( 'posts_selection', $where . $groupby . $orderby . $limits . $join );