如果一个数组的索引是最后一个倒带数组，则PHP循环两个数组

我有两个数组。第一个数组是names，它有5个名称。第二个数组是groups，它有3个组。我想循环遍历这两个数组，并将每个索引名设置为索引组。如果组索引完成，我想重新启动第二个数组

如果组索引到达最后一项，我尝试将其重置为0，但无效

$names = [
  'John',
  'Jane',
  'George',
  'Jim',
  'Jack'
];

$groups = [
  '1',
  '2',
  '3'
];

foreach ($names as $index => $name) {
   $result = "The student: " . $name . " belongs to the: " .$groups[$index]. "group" ;
   echo ($result);
   echo "<br>";
   echo "<br>";
}

---

提前谢谢

您可以对组索引进行模块化

$groups[$index%sizeOf（$groups）]

---

我们假设数组是数字索引的（从0开始），并且没有跳过的索引（即
$group
数组始终定义为
范围（1，$n）；
）

然后可以对该数组的长度使用模运算符
%
，如下所示

foreach ($names as $index => $name) {
   $result = "The student: " . $name . " belongs to group " .$groups[$index % count($groups)]. ".\n";
   echo $result;
}


现场演示
试试这个！在这段代码中，如果您添加了一个新的组，就不会有问题

<?php

$names = [
  'John',
  'Jane',
  'George',
  'Jim',
  'Jack'
];

$groups = [
  '1',
  '2',
  '3'
];

foreach ($names as $index => $name) {

   $result = "The student: " . $name . " belongs to the: " .$groups[$index % count($groups)]. "group" ;
   echo ($result);
   echo "<br>";
   echo "<br>";
}

这适用于任何类型的数组

$names = [
  'John',
  'Jane',
  'George',
  'Jim',
  'Jack'
];

global $groups;

$groups = [
  '1',
  '2',
  '3'
];

$newArr = array_combine(
            $names, 
              array_merge(
                  $groups,
                  array_map(
                    function($v){
                      global $groups;
                      return $groups[$v%count($groups)]; 
                    }, 
                   array_keys(array_diff_key($names, $groups))
                 )
              )
          );

你能在这里分享你的预期成果吗
foreach ($names as $index => $name) {
   $result = "The student: " . $name . " belongs to group " .$groups[$index % count($groups)]. ".\n";
   echo $result;
}

<?php

$names = [
  'John',
  'Jane',
  'George',
  'Jim',
  'Jack'
];

$groups = [
  '1',
  '2',
  '3'
];

foreach ($names as $index => $name) {

   $result = "The student: " . $name . " belongs to the: " .$groups[$index % count($groups)]. "group" ;
   echo ($result);
   echo "<br>";
   echo "<br>";
}

$names = [
  'John',
  'Jane',
  'George',
  'Jim',
  'Jack'
];

global $groups;

$groups = [
  '1',
  '2',
  '3'
];

$newArr = array_combine(
            $names, 
              array_merge(
                  $groups,
                  array_map(
                    function($v){
                      global $groups;
                      return $groups[$v%count($groups)]; 
                    }, 
                   array_keys(array_diff_key($names, $groups))
                 )
              )
          );