Online PHP editor | refs for LJ9il

<?php var_dump([ $original_set = [ 'arrayobject' => new arrayobject( [3] ), 'reference?' => [5] ], $original_serialized = serialize( $original_set ), $original_unserialized = unserialize( $original_serialized ), $withreference_serialized = preg_replace( '/a:1:{i:0;i:5;}}/', 'R:4;}', $original_serialized ), $withreference_unserialized = unserialize( $withreference_serialized ), $withreference_unserialized['arrayobject'][9] = 8, # $withreference_unserialized, # $withreference_unserialized['arrayobject'][9] === $withreference_unserialized['reference?'][9] # ? 'looks like a reference' : 'does not look like a reference' , ]) ;