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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 |
|---|---|
| 208 | /** |
| 209 | * Fires before user profile update errors are returned. |
| 210 | * |
| 211 | * @since 2.8.0 |
| 212 | * |
| 213 | * @param WP_Error $errors WP_Error object (passed by reference). |
| 214 | * @param bool $update Whether this is a user update. |
| 215 | * @param stdClass $user User object (passed by reference). |
| 216 | */ |
| 217 | do_action_ref_array( 'user_profile_update_errors', array( &$errors, $update, &$user ) ); |
| 218 | |
| 219 | if ( $errors->has_errors() ) { |
| 220 | return $errors; |
| 221 | } |
| 222 | |
| 223 | if ( $update ) { |
| 224 | $user_id = wp_update_user( $user ); |
| 225 | } else { |
| 226 | $user_id = wp_insert_user( $user ); |