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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 |
|---|---|
| 394 | * @param WP_Theme $theme The WP_Theme object. |
| 395 | * @param array $r { |
| 396 | * An array of metadata about the available theme update. |
| 397 | * |
| 398 | * @type string $new_version New theme version. |
| 399 | * @type string $url Theme URL. |
| 400 | * @type string $package Theme update package URL. |
| 401 | * } |
| 402 | */ |
| 403 | do_action( "in_theme_update_message-{$theme_key}", $theme, $r ); |
| 404 | |
| 405 | echo '</div></td></tr>'; |
| 406 | } |
| 407 | |
| 408 | function maintenance_nag() { |
| 409 | include ABSPATH . WPINC . '/version.php'; // include an unmodified $wp_version |
| 410 | global $upgrading; |
| 411 | $nag = isset( $upgrading ); |
| 412 | if ( ! $nag ) { |