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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 |
|---|---|
| 690 | * |
| 691 | * @type string $domain Domain for the site. |
| 692 | * @type string $path Path for the site. Used in subdirectory installs. |
| 693 | * @type string $blogname The unique site name (slug). |
| 694 | * @type string $blog_title Blog title. |
| 695 | * @type string $user User email address. |
| 696 | * @type WP_Error $errors WP_Error containing any errors found. |
| 697 | * } |
| 698 | */ |
| 699 | return apply_filters( 'wpmu_validate_blog_signup', $result ); |
| 700 | } |
| 701 | |
| 702 | /** |
| 703 | * Record site signup information for future activation. |
| 704 | * |
| 705 | * @since MU |
| 706 | * @uses wpmu_signup_blog_notification() |
| 707 | * |
| 708 | * @param string $domain The requested domain. |