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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 |
---|---|
2843 | * Filters the ORDER BY clause of the query. |
2844 | * |
2845 | * For use by caching plugins. |
2846 | * |
2847 | * @since 2.5.0 |
2848 | * |
2849 | * @param string $orderby The ORDER BY clause of the query. |
2850 | * @param WP_Query $query The WP_Query instance (passed by reference). |
2851 | */ |
2852 | $orderby = apply_filters_ref_array( 'posts_orderby_request', array( $orderby, &$this ) ); |
2853 |
|
2854 | /** |
2855 | * Filters the DISTINCT clause of the query. |
2856 | * |
2857 | * For use by caching plugins. |
2858 | * |
2859 | * @since 2.5.0 |
2860 | * |
2861 | * @param string $distinct The DISTINCT clause of the query. |