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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 |
|---|---|
| 908 | if ( $this->query_vars['number'] && ! $this->query_vars['no_found_rows'] ) { |
| 909 | /** |
| 910 | * Filters the query used to retrieve found comment count. |
| 911 | * |
| 912 | * @since 4.4.0 |
| 913 | * |
| 914 | * @param string $found_comments_query SQL query. Default 'SELECT FOUND_ROWS()'. |
| 915 | * @param WP_Comment_Query $comment_query The `WP_Comment_Query` instance. |
| 916 | */ |
| 917 | $found_comments_query = apply_filters( 'found_comments_query', 'SELECT FOUND_ROWS()', $this ); |
| 918 | |
| 919 | $this->found_comments = (int) $wpdb->get_var( $found_comments_query ); |
| 920 | } |
| 921 | } |
| 922 | |
| 923 | /** |
| 924 | * Fetch descendants for located comments. |
| 925 | * |
| 926 | * Instead of calling `get_children()` separately on each child comment, we do a single set of queries to fetch |