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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 |
|---|---|
| 121 | * The dynamic portion of the hook name, `$screen`, refers to the current screen ID. |
| 122 | * |
| 123 | * @since 4.7.0 |
| 124 | * |
| 125 | * @param string $redirect_url The redirect URL. |
| 126 | * @param string $action The action being taken. |
| 127 | * @param array $items The items to take the action on. |
| 128 | * @param int $site_id The site ID. |
| 129 | */ |
| 130 | $referer = apply_filters( "handle_network_bulk_actions-{$screen}", $referer, $action, $themes, $id ); |
| 131 | } else { |
| 132 | $action = 'error'; |
| 133 | $n = 'none'; |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | update_option( 'allowedthemes', $allowed_themes ); |
| 138 | restore_current_blog(); |
| 139 | |