current() advances untouched generator, same as next(), it makes the first step/iteration. the following calls will not.
non-yielded value will be NULL
(PHP 5 >= 5.5.0, PHP 7, PHP 8)
Generator::current — yield した値を取得する
この関数にはパラメータはありません。
yield した値を返します。
current() advances untouched generator, same as next(), it makes the first step/iteration. the following calls will not.
non-yielded value will be NULL