duanchi6397 2013-12-12 13:44
浏览 72
已采纳

仅执行一次foreach循环[关闭]

As we know foreach loop will execute till condition does not become false. I want to execute it only once.

$i=0;
foreach($html->find('img') as $element) 
{    

       if($i!=0)  
          break;
       $logo= $element->src . '<br>';
       $i++;
}

Is there any other solution for this? like foronce in place of foreach?

  • 写回答

1条回答 默认 最新

  • dongque1646 2013-12-12 13:49
    关注

    As we know foreach loop will execute till condition does not become false.

    A foreach loop will execute once for every item of the container unless a return or break condition is defined within the foreach block.

    I want to execute it only once.

    Loops that executes once are called "don't use a loop in the first place". Here's your example fixed:

    $logo = $html->find('img')[0]->src . '<br>';
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

报告相同问题?

悬赏问题

  • ¥15 metadata提取的PDF元数据,如何转换为一个Excel
  • ¥15 关于arduino编程toCharArray()函数的使用
  • ¥100 vc++混合CEF采用CLR方式编译报错
  • ¥15 coze 的插件输入飞书多维表格 app_token 后一直显示错误,如何解决?
  • ¥15 vite+vue3+plyr播放本地public文件夹下视频无法加载
  • ¥15 c#逐行读取txt文本,但是每一行里面数据之间空格数量不同
  • ¥50 如何openEuler 22.03上安装配置drbd
  • ¥20 ING91680C BLE5.3 芯片怎么实现串口收发数据
  • ¥15 无线连接树莓派,无法执行update,如何解决?(相关搜索:软件下载)
  • ¥15 Windows11, backspace, enter, space键失灵