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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 |
|---|---|
| 543 | * |
| 544 | * The dynamic portion of the hook name, `$this->screen->id`, refers |
| 545 | * to the ID of the current screen. |
| 546 | * |
| 547 | * @since 3.1.0 |
| 548 | * @since 5.6.0 A bulk action can now contain an array of options in order to create an optgroup. |
| 549 | * |
| 550 | * @param array $actions An array of the available bulk actions. |
| 551 | */ |
| 552 | $this->_actions = apply_filters( "bulk_actions-{$this->screen->id}", $this->_actions ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores |
| 553 | |
| 554 | $two = ''; |
| 555 | } else { |
| 556 | $two = '2'; |
| 557 | } |
| 558 | |
| 559 | if ( empty( $this->_actions ) ) { |
| 560 | return; |
| 561 | } |