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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.
This hook occurs 2 times in this file.
Line | Code |
---|---|
2784 |
|
2785 | /** |
2786 | * Filters the GROUP BY clause of the comments feed query before sending. |
2787 | * |
2788 | * @since 2.2.0 |
2789 | * |
2790 | * @param string $cgroupby The GROUP BY clause of the query. |
2791 | * @param WP_Query $query The WP_Query instance (passed by reference). |
2792 | */ |
2793 | $cgroupby = apply_filters_ref_array( 'comment_feed_groupby', array( $cgroupby, &$this ) ); |
2794 |
|
2795 | /** |
2796 | * Filters the ORDER BY clause of the comments feed query before sending. |
2797 | * |
2798 | * @since 2.8.0 |
2799 | * |
2800 | * @param string $corderby The ORDER BY clause of the query. |
2801 | * @param WP_Query $query The WP_Query instance (passed by reference). |
2802 | */ |
Line | Code |
3403 |
|
3404 | if ( ! empty( $this->posts ) && $this->is_comment_feed && $this->is_singular ) { |
3405 | /** This filter is documented in wp-includes/query.php */ |
3406 | $cjoin = apply_filters_ref_array( 'comment_feed_join', array( '', &$this ) ); |
3407 |
|
3408 | /** This filter is documented in wp-includes/query.php */ |
3409 | $cwhere = apply_filters_ref_array( 'comment_feed_where', array( "WHERE comment_post_ID = '{$this->posts[0]->ID}' AND comment_approved = '1'", &$this ) ); |
3410 |
|
3411 | /** This filter is documented in wp-includes/query.php */ |
3412 | $cgroupby = apply_filters_ref_array( 'comment_feed_groupby', array( '', &$this ) ); |
3413 | $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : ''; |
3414 |
|
3415 | /** This filter is documented in wp-includes/query.php */ |
3416 | $corderby = apply_filters_ref_array( 'comment_feed_orderby', array( 'comment_date_gmt DESC', &$this ) ); |
3417 | $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : ''; |
3418 |
|
3419 | /** This filter is documented in wp-includes/query.php */ |
3420 | $climits = apply_filters_ref_array( 'comment_feed_limits', array( 'LIMIT ' . get_option( 'posts_per_rss' ), &$this ) ); |
3421 |
|