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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 |
|---|---|
| 759 | * |
| 760 | * @type string $domain Domain for the site. |
| 761 | * @type string $path Path for the site. Used in subdirectory installations. |
| 762 | * @type string $blogname The unique site name (slug). |
| 763 | * @type string $blog_title Blog title. |
| 764 | * @type string|WP_User $user By default, an empty string. A user object if provided. |
| 765 | * @type WP_Error $errors WP_Error containing any errors found. |
| 766 | * } |
| 767 | */ |
| 768 | return apply_filters( 'wpmu_validate_blog_signup', $result ); |
| 769 | } |
| 770 | |
| 771 | /** |
| 772 | * Record site signup information for future activation. |
| 773 | * |
| 774 | * @since MU (3.0.0) |
| 775 | * |
| 776 | * @global wpdb $wpdb WordPress database abstraction object. |
| 777 | * |