嵌套的foreach循环，在循环内中断 [英] Nested foreach loop, break inside loop

问题描述

我尝试用嵌套的foreach循环创建一个列表.第一个循环是循环一些数字，第二个循环是循环日期.我想在一个日期上写一个数字.因此，还有另一个功能可以进行检查.但是结果是数字多次写在日期上.

I try to create a list with nested foreach loop. First loop is looping some numbers, second loop is looping dates. I want to write one number to one date. So there is a another function to check that. But the result is numbers writes on dates multiple times.

出来是这样的:

number 5 is on 2013.01.15;
number 5 is on 2013.01.16;
number 5 is on 2013.01.17;
number 6 is on 2013.01.15;
number 6 is on 2013.01.17;

代码:

function create_event($numbers,$available_dates) {
  foreach($numbers as $number) {
    foreach($avaliable_dates as $av_date) {

      $date_check= dateCheck($av_date,$number);

      if ($date_check == 0) {
        echo "number ".$number." is on ".$av_date;
        break;
      } else {
        $send_again[] = $number;
      }

    }
  }
  create_event($send_again,$avaliable_dates);
}

我认为内部循环不会中断.

I think inside loop is not break.

推荐答案

可以检查以下内容吗?

function create_event($numbers,$available_dates) {
    foreach ($numbers as $number) {
        foreach ($available_dates as &$av_date) {
            if (dateCheck($av_date, $number) == 0) {
                unset($av_date);
                break;
            }
        }
    }
}

这篇关于嵌套的foreach循环，在循环内中断的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！