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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 |
|---|---|
| 197 | * Fires when an error is added to a WP_Error object. |
| 198 | * |
| 199 | * @since 5.6.0 |
| 200 | * |
| 201 | * @param string|int $code Error code. |
| 202 | * @param string $message Error message. |
| 203 | * @param mixed $data Error data. Might be empty. |
| 204 | * @param WP_Error $wp_error The WP_Error object. |
| 205 | */ |
| 206 | do_action( 'wp_error_added', $code, $message, $data, $this ); |
| 207 | } |
| 208 | |
| 209 | /** |
| 210 | * Adds data to an error with the given code. |
| 211 | * |
| 212 | * @since 2.1.0 |
| 213 | * @since 5.6.0 Errors can now contain more than one item of error data. {@see WP_Error::$additional_data}. |
| 214 | * |
| 215 | * @param mixed $data Error data. |