php数组循环添加元素

循环$listening_collect是一个二维数组，往里面添加一个you_answer元素

$listening_collect = $this->ser_toefllistening->zt_collect($listening_articleid)->result_array();
		foreach ($listening_collect as $key => $value){
			$answer = $this->ser_toefllistening->answer($value['id'],$u_id);
			$listening_collect[$key]['you_answer'] = $answer['answer'];
		}

打印$listening_collect数组

添加之后打印$listening_collect数组