如果不手动定义数组id，如何显示foreach输出 - How do I display foreach output without define the array id manually?

How do I display foreach output without define the array id manually?

数组示例&输出

我如何管理我的foreach而不需要在每个循环中手动编写它?因为我不知道深度的孩子用户会选择。

$array['0']['children']
$array['1']['children']
$array['2']['children']

你应该创建一个递归函数来调用你的数组。

的例子:

<html><body>
<h1>test</h1>
<?php
$array = array(
    '0' => array(
        'id' => 1, 
        'name' => 'Sizes',
        'parent' => 0,
        'children' => array(
            '0' => array('id' => 4, 'name' => 'S', 'parent' => 1),
            '1' => array('id' => 5, 'name' => 'L', 'parent' => 1),
            '2' => array('id' => 6, 'name' => 'M', 'parent' => 1)
        )
    ),
    '1' => array(
        'id' => 2,
        'name' => 'Colors',
        'parent' => 0,
        'children' => array(
            '0' => array('id' => 7, 'name' => 'White', 'parent' => 2),
            '1' => array('id' => 8, 'name' => 'Black', 'parent' => 2)
        )
    ),
     '2' => array(
        'id' => 3,
        'name' => 'Types',
        'parent' => 0,
        'children' => array(
            '0' => array('id' => 9, 'name' => 'Polyester', 'parent' => 3),
            '1' => array('id' => 10, 'name' => 'Lycra', 'parent' => 3)
        )
    )
 );

function my_recurse($array, $depth=0) {
   //to avoid infinite depths check for a high value
   if($depth>100) {  return; }  
   //

   foreach ($array as $id => $child) {
        echo "Array element $id = " . $child['id'] . " " . $child['name'] . "<br>'n";    //whatever you wanna output
     // test if got ghildren
     if(isset($child['children'])) {   
         my_recurse($child['children'], $depth+1); // Call to self on infinite depth. 
     }
   }
}

my_recurse($array);
?>
</body></html>

请注意!始终在函数中使用深度检查以避免无限递归。

这在我的浏览器中给出了以下输出:

测试

数组元素0 = 1

数组元素0 = 4 S

数组元素1 = 5l

数组元素2 = 6m

数组元素1 = 2

数组元素0 = 7

数组元素1 = 8

数组元素2 = 3

数组元素0 = 9聚酯

元素1 = 10

我想这就是我要做的....

foreach($array as $item) {
    foreach($item['children'] as $child) {
          echo $child['stuff'];
    }
}