重新排列对象php

假设一个记录表 $products 它可以用这样的PHP编写:

// restructure array as merchants having nested record sets
$merchants = [];
foreach(array_unique(array_column($products, 'merchant')) as $merchant)
  $merchants[$merchant] = array_values(array_filter($products, function($v)use($merchant){ return $v->merchant === $merchant;}));

// itererate over indexes up do max. products per merchant and a add a product of
// each merchant having a record with that index
$max_count = max(array_map(function($v){return count($v);}, $merchants));
$new_order = [];

for($i = 0; $i<$max_count; $i++)
  foreach ($merchants as $merchant)
    if($item = $merchant[$i] ?? false)
      $new_order[] = $item;


var_dump($new_order);

根据您的评论,您似乎有一个对象,您称之为“列表”,类似于:

$products_object = (object)
  [
    (object)[
      'merchant' => 'theredshop',
      'name'     => 'pepsi',
    ],
    (object)[
      'merchant' => 'sevel',
      'name'     => 'pepsi',
    ],
    (object)[
      'merchant' => 'sevel',
      'name'     => 'lorem',
    ],

    (object)[
      'merchant' => 'sevel',
      'name'     => 'ipsum',
    ],

    (object)[
      'merchant' => 'bluecircle',
      'name'     => 'ipsum',
    ],

  ];

首先将其转换为数组,以便在其上使用数组函数进行操作:

$products = (array) $products_object;