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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 |
|---|---|
| 2981 | |
| 2982 | /** |
| 2983 | * Filter the GROUP BY clause of the query. |
| 2984 | * |
| 2985 | * @since 2.0.0 |
| 2986 | * |
| 2987 | * @param string $groupby The GROUP BY clause of the query. |
| 2988 | * @param WP_Query &$this The WP_Query instance (passed by reference). |
| 2989 | */ |
| 2990 | $groupby = apply_filters_ref_array( 'posts_groupby', array( $groupby, &$this ) ); |
| 2991 | |
| 2992 | /** |
| 2993 | * Filter the JOIN clause of the query. |
| 2994 | * |
| 2995 | * Specifically for manipulating paging queries. |
| 2996 | * |
| 2997 | * @since 1.5.0 |
| 2998 | * |
| 2999 | * @param string $join The JOIN clause of the query. |