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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 | } |