wp-includes/class-wp-error.php:282Merges the errors in the given error object into this one.
$errorWP_Error public function merge_from( WP_Error $error ) { static::copy_errors( $error, $this ); }Introduced in 5.6.0. One change between 6.7.7 and 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
none to void.verified against sourcesrc/wp-includes/class-wp-error.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.