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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 |
|---|---|
| 245 | echo '<p class="error">' . $errmsg . '</p>'; |
| 246 | } |
| 247 | /** |
| 248 | * Fires at the end of the user registration form on the site sign-up form. |
| 249 | * |
| 250 | * @since 3.0.0 |
| 251 | * |
| 252 | * @param WP_Error $errors A WP_Error object containing 'user_name' or 'user_email' errors. |
| 253 | */ |
| 254 | do_action( 'signup_extra_fields', $errors ); |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * Validate user signup name and email |
| 259 | * |
| 260 | * @since MU (3.0.0) |
| 261 | * |
| 262 | * @return array Contains username, email, and error messages. |
| 263 | */ |