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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 |
|---|---|
| 591 | * @param array $result { |
| 592 | * The array of user name, email, and the error messages. |
| 593 | * |
| 594 | * @type string $user_name Sanitized and unique username. |
| 595 | * @type string $orig_username Original username. |
| 596 | * @type string $user_email User email address. |
| 597 | * @type WP_Error $errors WP_Error object containing any errors found. |
| 598 | * } |
| 599 | */ |
| 600 | return apply_filters( 'wpmu_validate_user_signup', $result ); |
| 601 | } |
| 602 | |
| 603 | /** |
| 604 | * Processes new site registrations. |
| 605 | * |
| 606 | * Checks the data provided by the user during blog signup. Verifies |
| 607 | * the validity and uniqueness of blog paths and domains. |
| 608 | * |
| 609 | * This function prevents the current user from registering a new site |