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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 |
|---|---|
| 391 | |
| 392 | $dotted_domain = ".$banned_domain"; |
| 393 | if ( $dotted_domain === substr( $user_email, -strlen( $dotted_domain ) ) ) { |
| 394 | $is_email_address_unsafe = true; |
| 395 | break; |
| 396 | } |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | return apply_filters( 'is_email_address_unsafe', $is_email_address_unsafe, $user_email ); |
| 401 | } |
| 402 | |
| 403 | /** |
| 404 | * Processes new user registrations. |
| 405 | * |
| 406 | * Checks the data provided by the user during signup. Verifies |
| 407 | * the validity and uniqueness of user names and user email addresses, |
| 408 | * and checks email addresses against admin-provided domain |
| 409 | * whitelists and blacklists. |