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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 |
---|---|
2689 | * Filters the JOIN clause of the query. |
2690 | * |
2691 | * Specifically for manipulating paging queries. |
2692 | * |
2693 | * @since 1.5.0 |
2694 | * |
2695 | * @param string $join The JOIN clause of the query. |
2696 | * @param WP_Query $this The WP_Query instance (passed by reference). |
2697 | */ |
2698 | $join = apply_filters_ref_array( 'posts_join_paged', array( $join, &$this ) ); |
2699 |
|
2700 | /** |
2701 | * Filters the ORDER BY clause of the query. |
2702 | * |
2703 | * @since 1.5.1 |
2704 | * |
2705 | * @param string $orderby The ORDER BY clause of the query. |
2706 | * @param WP_Query $this The WP_Query instance (passed by reference). |
2707 | */ |