It should be noted that next() sends an implicit null into the generator to ensure that code execution isn't blocked if the generator is expecting a value to be sent into it and the code doesn't execute any send()
(PHP 5 >= 5.5.0, PHP 7, PHP 8)
Generator::next — Continua a execução do gerador
Chamar Generator::next() tem o mesmo efeito que chamar
Generator::send() com o argumento null
.
Esta função não possui parâmetros.
Nenhum valor é retornado.
It should be noted that next() sends an implicit null into the generator to ensure that code execution isn't blocked if the generator is expecting a value to be sent into it and the code doesn't execute any send()