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To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 2738 | /** |
| 2739 | * Fires to announce the query's current selection parameters. |
| 2740 | * |
| 2741 | * For use by caching plugins. |
| 2742 | * |
| 2743 | * @since 2.3.0 |
| 2744 | * |
| 2745 | * @param string $selection The assembled selection query. |
| 2746 | */ |
| 2747 | do_action( 'posts_selection', $where . $groupby . $orderby . $limits . $join ); |
| 2748 | |
| 2749 | /* |
| 2750 | * Filters again for the benefit of caching plugins. |
| 2751 | * Regular plugins should use the hooks above. |
| 2752 | */ |
| 2753 | if ( ! $q['suppress_filters'] ) { |
| 2754 | /** |
| 2755 | * Filters the WHERE clause of the query. |
| 2756 | * |