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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 |
|---|---|
| 405 | ob_start(); |
| 406 | |
| 407 | $this->comment_type_dropdown( $comment_type ); |
| 408 | |
| 409 | /** |
| 410 | * Fires just before the Filter submit button for comment types. |
| 411 | * |
| 412 | * @since 3.5.0 |
| 413 | */ |
| 414 | do_action( 'restrict_manage_comments' ); |
| 415 | |
| 416 | $output = ob_get_clean(); |
| 417 | |
| 418 | if ( ! empty( $output ) && $this->has_items() ) { |
| 419 | echo $output; |
| 420 | submit_button( __( 'Filter' ), '', 'filter_action', false, array( 'id' => 'post-query-submit' ) ); |
| 421 | } |
| 422 | } |
| 423 | |