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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 |
---|---|
2661 | * Filters the ORDER BY clause of the query. |
2662 | * |
2663 | * For use by caching plugins. |
2664 | * |
2665 | * @since 2.5.0 |
2666 | * |
2667 | * @param string $orderby The ORDER BY clause of the query. |
2668 | * @param WP_Query &$this The WP_Query instance (passed by reference). |
2669 | */ |
2670 | $orderby = apply_filters_ref_array( 'posts_orderby_request', array( $orderby, &$this ) ); |
2671 |
|
2672 | /** |
2673 | * Filters the DISTINCT clause of the query. |
2674 | * |
2675 | * For use by caching plugins. |
2676 | * |
2677 | * @since 2.5.0 |
2678 | * |
2679 | * @param string $distinct The DISTINCT clause of the query. |