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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 |
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2669 |
|
2670 | /** |
2671 | * Filters the JOIN clause of the query. |
2672 | * |
2673 | * @since 1.5.0 |
2674 | * |
2675 | * @param string $join The JOIN clause of the query. |
2676 | * @param WP_Query $query The WP_Query instance (passed by reference). |
2677 | */ |
2678 | $join = apply_filters_ref_array( 'posts_join', array( $join, &$this ) ); |
2679 | } |
2680 |
|
2681 | // Paging. |
2682 | if ( empty( $q['nopaging'] ) && ! $this->is_singular ) { |
2683 | $page = absint( $q['paged'] ); |
2684 | if ( ! $page ) { |
2685 | $page = 1; |
2686 | } |
2687 |
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