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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 |
|---|---|
| 369 | if ( $groupby ) |
| 370 | $groupby = 'GROUP BY ' . $groupby; |
| 371 | |
| 372 | $query = "SELECT $fields FROM $wpdb->comments $join WHERE $where $groupby ORDER BY $orderby $order $limits"; |
| 373 | |
| 374 | if ( $count ) |
| 375 | return $wpdb->get_var( $query ); |
| 376 | |
| 377 | $comments = $wpdb->get_results( $query ); |
| 378 | $comments = apply_filters_ref_array( 'the_comments', array( $comments, &$this ) ); |
| 379 | |
| 380 | wp_cache_add( $cache_key, $comments, 'comment' ); |
| 381 | |
| 382 | return $comments; |
| 383 | } |
| 384 | |
| 385 | /* |
| 386 | * Used internally to generate an SQL string for searching across multiple columns |
| 387 | * |