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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 |
---|---|
3255 |
|
3256 | /** |
3257 | * Filter the GROUP BY clause of the comments feed query before sending. |
3258 | * |
3259 | * @since 2.2.0 |
3260 | * |
3261 | * @param string $cgroupby The GROUP BY clause of the query. |
3262 | * @param WP_Query &$this The WP_Query instance (passed by reference). |
3263 | */ |
3264 | $cgroupby = apply_filters_ref_array( 'comment_feed_groupby', array( $cgroupby, &$this ) ); |
3265 |
|
3266 | /** |
3267 | * Filter the ORDER BY clause of the comments feed query before sending. |
3268 | * |
3269 | * @since 2.8.0 |
3270 | * |
3271 | * @param string $corderby The ORDER BY clause of the query. |
3272 | * @param WP_Query &$this The WP_Query instance (passed by reference). |
3273 | */ |
Line | Code |
3647 |
|
3648 | if ( !empty($this->posts) && $this->is_comment_feed && $this->is_singular ) { |
3649 | /** This filter is documented in wp-includes/query.php */ |
3650 | $cjoin = apply_filters_ref_array( 'comment_feed_join', array( '', &$this ) ); |
3651 |
|
3652 | /** This filter is documented in wp-includes/query.php */ |
3653 | $cwhere = apply_filters_ref_array( 'comment_feed_where', array( "WHERE comment_post_ID = '{$this->posts[0]->ID}' AND comment_approved = '1'", &$this ) ); |
3654 |
|
3655 | /** This filter is documented in wp-includes/query.php */ |
3656 | $cgroupby = apply_filters_ref_array( 'comment_feed_groupby', array( '', &$this ) ); |
3657 | $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : ''; |
3658 |
|
3659 | /** This filter is documented in wp-includes/query.php */ |
3660 | $corderby = apply_filters_ref_array( 'comment_feed_orderby', array( 'comment_date_gmt DESC', &$this ) ); |
3661 | $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : ''; |
3662 |
|
3663 | /** This filter is documented in wp-includes/query.php */ |
3664 | $climits = apply_filters_ref_array( 'comment_feed_limits', array( 'LIMIT ' . get_option('posts_per_rss'), &$this ) ); |
3665 |
|