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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 |
|---|---|
| 392 | * Otherwise the filter should return an array of WP_Comment objects. |
| 393 | * |
| 394 | * @since 5.3.0 |
| 395 | * |
| 396 | * @param array|int|null $comment_data Return an array of comment data to short-circuit WP's comment query, |
| 397 | * the comment count as an integer if `$this->query_vars['count']` is set, |
| 398 | * or null to allow WP to run its normal queries. |
| 399 | * @param WP_Comment_Query $this The WP_Comment_Query instance, passed by reference. |
| 400 | */ |
| 401 | $comment_data = apply_filters_ref_array( 'comments_pre_query', array( $comment_data, &$this ) ); |
| 402 | |
| 403 | if ( null !== $comment_data ) { |
| 404 | return $comment_data; |
| 405 | } |
| 406 | |
| 407 | /* |
| 408 | * Only use the args defined in the query_var_defaults to compute the key, |
| 409 | * but ignore 'fields', which does not affect query results. |
| 410 | */ |