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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 |
---|---|
2935 | * Filters the DISTINCT clause of the query. |
2936 | * |
2937 | * For use by caching plugins. |
2938 | * |
2939 | * @since 2.5.0 |
2940 | * |
2941 | * @param string $distinct The DISTINCT clause of the query. |
2942 | * @param WP_Query $query The WP_Query instance (passed by reference). |
2943 | */ |
2944 | $distinct = apply_filters_ref_array( 'posts_distinct_request', array( $distinct, &$this ) ); |
2945 |
|
2946 | /** |
2947 | * Filters the SELECT clause of the query. |
2948 | * |
2949 | * For use by caching plugins. |
2950 | * |
2951 | * @since 2.5.0 |
2952 | * |
2953 | * @param string $fields The SELECT clause of the query. |