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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 |
|---|---|
| 640 | * |
| 641 | * @type string $domain Domain for the site. |
| 642 | * @type string $path Path for the site. Used in subdirectory installs. |
| 643 | * @type string $blogname The unique site name (slug). |
| 644 | * @type string $blog_title Blog title. |
| 645 | * @type string|WP_User $user By default, an empty string. A user object if provided. |
| 646 | * @type WP_Error $errors WP_Error containing any errors found. |
| 647 | * } |
| 648 | */ |
| 649 | return apply_filters( 'wpmu_validate_blog_signup', $result ); |
| 650 | } |
| 651 | |
| 652 | /** |
| 653 | * Record site signup information for future activation. |
| 654 | * |
| 655 | * @since MU |
| 656 | * |
| 657 | * @global wpdb $wpdb WordPress database abstraction object. |
| 658 | * |