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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 |
|---|---|
| 182 | /** |
| 183 | * Fires before user profile update errors are returned. |
| 184 | * |
| 185 | * @since 2.8.0 |
| 186 | * |
| 187 | * @param WP_Error $errors WP_Error object (passed by reference). |
| 188 | * @param bool $update Whether this is a user update. |
| 189 | * @param stdClass $user User object (passed by reference). |
| 190 | */ |
| 191 | do_action_ref_array( 'user_profile_update_errors', array( &$errors, $update, &$user ) ); |
| 192 | |
| 193 | if ( $errors->get_error_codes() ) |
| 194 | return $errors; |
| 195 | |
| 196 | if ( $update ) { |
| 197 | $user_id = wp_update_user( $user ); |
| 198 | } else { |
| 199 | $user_id = wp_insert_user( $user ); |
| 200 | $notify = isset( $_POST['send_user_notification'] ) ? 'both' : 'admin'; |