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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 |
|---|---|
| 155 | unset( $login_header_url, $login_header_title ); |
| 156 | |
| 157 | /** |
| 158 | * Filter the message to display above the login form. |
| 159 | * |
| 160 | * @since 2.1.0 |
| 161 | * |
| 162 | * @param string $message Login message text. |
| 163 | */ |
| 164 | $message = apply_filters( 'login_message', $message ); |
| 165 | if ( !empty( $message ) ) |
| 166 | echo $message . "\n"; |
| 167 | |
| 168 | // In case a plugin uses $error rather than the $wp_errors object |
| 169 | if ( !empty( $error ) ) { |
| 170 | $wp_error->add('error', $error); |
| 171 | unset($error); |
| 172 | } |
| 173 | |