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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 |
|---|---|
| 295 | * The dynamic portion of the hook name, $this->screen->id, refers |
| 296 | * to the ID of the current screen, usually a string. |
| 297 | * |
| 298 | * This filter can currently only be used to remove bulk actions. |
| 299 | * |
| 300 | * @since 3.5.0 |
| 301 | * |
| 302 | * @param array $actions An array of the available bulk actions. |
| 303 | */ |
| 304 | $this->_actions = apply_filters( "bulk_actions-{$this->screen->id}", $this->_actions ); |
| 305 | $this->_actions = array_intersect_assoc( $this->_actions, $no_new_actions ); |
| 306 | $two = ''; |
| 307 | } else { |
| 308 | $two = '2'; |
| 309 | } |
| 310 | |
| 311 | if ( empty( $this->_actions ) ) |
| 312 | return; |
| 313 | |