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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 |
|---|---|
| 264 | * @since 3.1.0 |
| 265 | * @access public |
| 266 | */ |
| 267 | function bulk_actions() { |
| 268 | $screen = get_current_screen(); |
| 269 | |
| 270 | if ( is_null( $this->_actions ) ) { |
| 271 | $no_new_actions = $this->_actions = $this->get_bulk_actions(); |
| 272 | // This filter can currently only be used to remove actions. |
| 273 | $this->_actions = apply_filters( 'bulk_actions-' . $screen->id, $this->_actions ); |
| 274 | $this->_actions = array_intersect_assoc( $this->_actions, $no_new_actions ); |
| 275 | $two = ''; |
| 276 | } else { |
| 277 | $two = '2'; |
| 278 | } |
| 279 | |
| 280 | if ( empty( $this->_actions ) ) |
| 281 | return; |
| 282 | |