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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 |
|---|---|
| 394 | if ( 'top' === $which ) { |
| 395 | ob_start(); |
| 396 | |
| 397 | $this->comment_status_dropdown( $comment_type ); |
| 398 | /** |
| 399 | * Fires just before the Filter submit button for comment types. |
| 400 | * |
| 401 | * @since 3.5.0 |
| 402 | */ |
| 403 | do_action( 'restrict_manage_comments' ); |
| 404 | |
| 405 | $output = ob_get_clean(); |
| 406 | |
| 407 | if ( ! empty( $output ) && $this->has_items() ) { |
| 408 | echo $output; |
| 409 | submit_button( esc_html__( 'Filter' ), '', 'filter_action', false, array( 'id' => 'post-query-submit' ) ); |
| 410 | } |
| 411 | } |
| 412 | |