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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 |
|---|---|
| 192 | echo '<p class="error">' . $errmsg . '</p>'; |
| 193 | } |
| 194 | /** |
| 195 | * Fires at the end of the user registration form on the site sign-up form. |
| 196 | * |
| 197 | * @since 3.0.0 |
| 198 | * |
| 199 | * @param array $errors An array possibly containing 'user_name' or 'user_email' errors. |
| 200 | */ |
| 201 | do_action( 'signup_extra_fields', $errors ); |
| 202 | } |
| 203 | |
| 204 | /** |
| 205 | * Validate user signup name and email |
| 206 | * |
| 207 | * @since MU |
| 208 | * |
| 209 | * @return array Contains username, email, and error messages. |
| 210 | */ |