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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 |
|---|---|
| 280 | |
| 281 | if ( ! empty( $messages ) ) { |
| 282 | /** |
| 283 | * Filters instructional messages displayed above the login form. |
| 284 | * |
| 285 | * @since 2.5.0 |
| 286 | * |
| 287 | * @param string $messages Login messages. |
| 288 | */ |
| 289 | $messages = apply_filters( 'login_messages', $messages ); |
| 290 | wp_admin_notice( |
| 291 | $messages, |
| 292 | array( |
| 293 | 'type' => 'info', |
| 294 | 'id' => 'login-message', |
| 295 | 'additional_classes' => array( 'message' ), |
| 296 | 'paragraph_wrap' => false, |
| 297 | ) |
| 298 | ); |