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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 |
|---|---|
| 222 | <h1 role="presentation" class="wp-login-logo"><a href="<?php echo esc_url( $login_header_url ); ?>"><?php echo $login_header_text; ?></a></h1> |
| 223 | <?php |
| 224 | /** |
| 225 | * Filters the message to display above the login form. |
| 226 | * |
| 227 | * @since 2.1.0 |
| 228 | * |
| 229 | * @param string $message Login message text. |
| 230 | */ |
| 231 | $message = apply_filters( 'login_message', $message ); |
| 232 | |
| 233 | if ( ! empty( $message ) ) { |
| 234 | echo $message . "\n"; |
| 235 | } |
| 236 | |
| 237 | // In case a plugin uses $error rather than the $wp_errors object. |
| 238 | if ( ! empty( $error ) ) { |
| 239 | $wp_error->add( 'error', $error ); |
| 240 | unset( $error ); |