嵌套的foreach php

Question

288
   36
      123
      456
      789
29
   36
      123
      456
      789
295
   36
      123
      456
      789

288,29,295是我的第一个数组36,36,36是我的数组数组，123,456,789是我的另一个数组。

我想要显示

288
   36
      123
29
   36
      456
295
   36
      789

这是我的代码

$nos = $_POST['nos'];
$nos2 = $_POST['nos2'];
$nos3 = $_POST['nos3'];
    foreach($nos as $nbs)
    {
        echo $nbs."<br>";   
        foreach($nos2 as $nbs2)
        {
            echo "&nbsp;&nbsp;&nbsp;".$nbs2."<br>";
            foreach($nos3 as $nbs3)
            {
                echo "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".$nbs3."<br>";

            }
            break;
        }
    }

我怎么能用foreach做呢 请帮帮我。

Answer 1

改为使用循环：

    $nos = $_POST['nos'];
    $nos2 = $_POST['nos2'];
    $nos3 = $_POST['nos3'];
    for($i = 0 ; $i < count($nos) ; $i++){
      if(isset($nos[$i])) echo $nos[$i]."<br>";
      if(isset($nos2[$i])) echo "&nbsp;&nbsp;&nbsp;".$nos2[$i]."<br>";
      if(isset($nos3[$i])) echo "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".$nos3[$i]."<br>";
    }

或者像这样预先

    $nos = $_POST['nos'];
    $nos2 = $_POST['nos2'];
    $nos3 = $_POST['nos3'];
    foreach($nos as $i => $n){
      echo $n."<br>";
      if(isset($nos2[$i])) echo "&nbsp;&nbsp;&nbsp;".$nos2[$i]."<br>";
      if(isset($nos3[$i])) echo "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".$nos3[$i]."<br>";
    }

修改

如果您没有数字键或不同的索引，则可以按array_values更改分配http://php.net/manual/en/function.array-values.php

    $nos = array_values($_POST['nos']);
    $nos2 = array_values($_POST['nos2']);
    $nos3 = array_values($_POST['nos3']);

https://eval.in/671937

Answer 2

试试这个， 使用计数器，因此它将显示$ nos3（最后一个foreach循环）值的foreach作为预期输出

$counts = 0;
foreach($nos as $nbs)
{   
    echo $nbs."<br>";   
    foreach($nos2 as $nbs2)
    {
        echo "&nbsp;&nbsp;&nbsp;".$nbs2."<br>";
        $sub_counts = 0;
        foreach($nos3 as $nbs3)
        {
            if($counts == $sub_counts)
            {
                echo "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".$nbs3."<br>";
            }           
            $sub_counts ++;
        }
        break;
    }
    $counts ++;
}

我希望它会有所帮助。

<强> DEMO

Answer 3

如果您只是调试嵌套数组的内容，并希望以人性化的方式查看它，您可以尝试：

print_r($my_nested_array) - 请参阅here

或

var_dump($my_nested_array) - 请参阅here

Answer 4

    $nos = $_POST['nos'];
    $nos2 = $_POST['nos2'];
    $nos3 = $_POST['nos3'];

    foreach($nos as $nbs) {
        echo $nbs . "<br />";   

        foreach($nos2 as $nbs2) {
            echo "&nbsp;&nbsp;&nbsp;" . $nbs2 . "<br />";

            foreach($nos3 as $nbs3) {
                echo "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;" . $nbs3 . "<br />";
                break; // stop the looping, in this case after the first time
            }

            break; // stop the looping, in this case after the first time
        }

        break; // stop the looping, in this case after the first time
    }