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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 |
|---|---|
| 277 | echo '<p class="error">' . $errmsg . '</p>'; |
| 278 | } |
| 279 | /** |
| 280 | * Fires at the end of the user registration form on the site sign-up form. |
| 281 | * |
| 282 | * @since 3.0.0 |
| 283 | * |
| 284 | * @param WP_Error $errors A WP_Error object containing 'user_name' or 'user_email' errors. |
| 285 | */ |
| 286 | do_action( 'signup_extra_fields', $errors ); |
| 287 | } |
| 288 | |
| 289 | /** |
| 290 | * Validate user signup name and email |
| 291 | * |
| 292 | * @since MU (3.0.0) |
| 293 | * |
| 294 | * @return array Contains username, email, and error messages. |
| 295 | */ |