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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 |
|---|---|
| 220 | |
| 221 | /** |
| 222 | * Fires before the Filter button on the Posts and Pages list tables. |
| 223 | * |
| 224 | * The Filter button allows sorting by date and/or category on the |
| 225 | * Posts list table, and sorting by date on the Pages list table. |
| 226 | * |
| 227 | * @since 2.1.0 |
| 228 | */ |
| 229 | do_action( 'restrict_manage_posts' ); |
| 230 | |
| 231 | submit_button( __( 'Filter' ), 'button', false, false, array( 'id' => 'post-query-submit' ) ); |
| 232 | } |
| 233 | |
| 234 | if ( $this->is_trash && current_user_can( get_post_type_object( $this->screen->post_type )->cap->edit_others_posts ) ) { |
| 235 | submit_button( __( 'Empty Trash' ), 'apply', 'delete_all', false ); |
| 236 | } |
| 237 | ?> |
| 238 | </div> |