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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 |
---|---|
2899 | * Filters the GROUP BY clause of the query. |
2900 | * |
2901 | * For use by caching plugins. |
2902 | * |
2903 | * @since 2.5.0 |
2904 | * |
2905 | * @param string $groupby The GROUP BY clause of the query. |
2906 | * @param WP_Query $query The WP_Query instance (passed by reference). |
2907 | */ |
2908 | $groupby = apply_filters_ref_array( 'posts_groupby_request', array( $groupby, &$this ) ); |
2909 |
|
2910 | /** |
2911 | * Filters the JOIN clause of the query. |
2912 | * |
2913 | * For use by caching plugins. |
2914 | * |
2915 | * @since 2.5.0 |
2916 | * |
2917 | * @param string $join The JOIN clause of the query. |