Question

我有一个mysql查询，它会吐出以下数组：

Array
(
    [0] => stdClass Object
        (
            [item1] => foo 0
            [item2] => bar 0
            [catid] => 3
        )

    [1] => stdClass Object
        (
            [item1] => foo 1
            [item2] => bar 1
            [catid] => 7
        )

    [2] => stdClass Object
        (
            [item1] => foo 2
            [item2] => bar 2
            [catid] => 10
        )

    [3] => stdClass Object
        (
            [item1] => foo 3
            [item2] => bar 3
            [catid] => 7
        )

)

我想知道是否可以按“类别”对数组进行分组，所以不是重复的catids，每个对象里面都会有一个catid ..如果这有意义吗？所以说catid 7只会出现一次，其中有两个item1 / item2。

Answer 1

这个怎么样？

foreach($results as $result) {
    $by_category[$result->catid][] = $result;
}

print_r($by_category);

Answer 2

您可以使用ouzo goodies：

执行此操作

 $categories = Arrays::groupBy($results, Functions::extractField('catid'));

请参阅：http://ouzo.readthedocs.org/en/latest/utils/arrays.html#groupby

Answer 3

$ret = array();
foreach ($array as $value) {
  foreach ($value as $key => $item) {
      if ($key == 'catid') continue;
      $ret[$value['catid']][] = $item;
  }
}

需要帮助分组一个php数组

3 个答案: