php中的数组排序有多种方式答案

【问题标题】：Array sort in php with multiple waysphp中的数组排序有多种方式
【发布时间】：2015-05-31 17:15:21
【问题描述】：

例如，我有两个数组数组1：

Array(
    [id] => 50575
    [name] => Funbox - Pirates and Princesses
    [venue_id] => 3248
)

数组2：

Array
(
    [0] => Array
        (
            [id] => 53295
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2954
        )

    [1] => Array
        (
            [id] => 53323
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2954
        )

    [2] => Array
        (
            [id] => 53391
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2954
        )

    [3] => Array
        (
            [id] => 53402
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2954
        )

    [4] => Array
        (
            [id] => 57130
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2980
        )

    [5] => Array
        (
            [id] => 57142
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 3248
        )

    [6] => Array
        (
            [id] => 50575
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 3248
        )

    [7] => Array
        (
            [id] => 50601
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 3248
        )

    [8] => Array
        (
            [id] => 56113
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2882
        )
)

数组 1 将是数组 2 中的任意一个子数组，

现在我希望在数组 2 中的第一个数组应该是数组 1 的数组，之后应该存在与数组 1 的场地 id 相同的那些子数组，然后是所有其他数组。如何进行这种排序？抱歉，如果有任何英语错误，我不擅长。

预期输出：

Array
    (
        [6] => Array
            (
                [id] => 50575
                [name] => Funbox - Pirates and Princesses
                [venue_id] => 3248
            )
        [5] => Array
            (
                [id] => 57142
                [name] => Funbox - Pirates and Princesses
                [venue_id] => 3248
            )
        [7] => Array
            (
                [id] => 50601
                [name] => Funbox - Pirates and Princesses
                [venue_id] => 3248
            )
        [0] => Array
            (
                [id] => 53295
                [name] => Funbox - Pirates and Princesses
                [venue_id] => 2954
            )

        [1] => Array
            (
                [id] => 53323
                [name] => Funbox - Pirates and Princesses
                [venue_id] => 2954
            )

        [2] => Array
            (
                [id] => 53391
                [name] => Funbox - Pirates and Princesses
                [venue_id] => 2954
            )

        [3] => Array
            (
                [id] => 53402
                [name] => Funbox - Pirates and Princesses
                [venue_id] => 2954
            )

        [4] => Array
            (
                [id] => 57130
                [name] => Funbox - Pirates and Princesses
                [venue_id] => 2980
            )
        [8] => Array
            (
                [id] => 56113
                [name] => Funbox - Pirates and Princesses
                [venue_id] => 2882
            )
    )

【问题讨论】：

请举例说明预期结果应该如何。
now i want that in array 2 the first array should be that one which is array 1, after that those sub arrays which have venue id same as array 1 venue id should exist and then all other arrays. 没听懂..
请用预期的输出编辑您的问题。
也发布您的预期输出？
等我这样做

标签： php arrays codeigniter

【解决方案1】：

这是一个自定义函数应该做你想做的：

 function sortArr($haystack, $needle){
        $out = array();

        foreach ($haystack as $index => $arr){
            if ($arr == $needle){
                $out["$index"] = $arr;
                unset ($haystack[$index]);
                break;
            } 
        }
        foreach ($haystack as $index => $arr){
            if ($arr['venue_id'] == $needle['venue_id']){
                $out["$index"] = $arr;
                unset($haystack[$index]);
            }
        }
        if (is_array($haystack)){
            return array_merge($out,$haystack);
        }

    }

以下是DEMO LINK

【讨论】：

【解决方案2】：

您可以使用usort 将其排序到您的示例顺序。

function cmp($a, $b) {
  return $b["venue_id"] - $a["venue_id"];
}

usort($array2,"cmp");

所有这一切都是按venue_id降序排序。所以所有具有相同venue_id的数组都会被分组，最高的venue_id在顶部。如果您想要其他东西，您的回答有点不清楚。

编辑：我对此进行了更多思考，并提出了一个可以满足我认为您要求的功能。它并不完美，但应该可以。

function customSort($array1,$array2) {
    global $primaryVenue_id;
    $primaryVenue_id = $array1["venue_id"];
    function cmp($a, $b) {
        global $primaryVenue_id;
        if ($a["venue_id"] == $primaryVenue_id) return -1;
        elseif ($b["venue_id"] == $primaryVenue_id) return 1;
        else return $b["venue_id"] - $a["venue_id"];
    }

    usort($array2, "cmp");

    unset($primaryVenue_id);

    return $array2;
}

基本上，如果您调用函数 customSort($array1,$array2)，那么它将返回 $array2，所有子数组首先包含与 $array1 相同的场所 ID，然后是id的其余降序。

【讨论】：

【解决方案3】：

您可以从第二个数组中取消设置匹配元素，然后使用 function array_unshift($array, $element); 预置数组。

$needle = array(
  'id' => 50575,
  'name' => 'Funbox - Pirates and Princesses',
  'venue_id' => 3248
);

$stack = array(
  [0] => Array
        (
            [id] => 53295
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2954
        )

    [1] => Array
        (
            [id] => 53323
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2954
        )

    [2] => Array
        (
            [id] => 53391
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2954
        )

    [3] => Array
        (
            [id] => 53402
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2954
        )

    [4] => Array
        (
            [id] => 57130
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2980
        )

    [5] => Array
        (
            [id] => 57142
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 3248
        )

    [6] => Array
        (
            [id] => 50575
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 3248
        )

    [7] => Array
        (
            [id] => 50601
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 3248
        )

    [8] => Array
        (
            [id] => 56113
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2882
        )
);

foreach ($stack as $k => $v) {
  if ($v['id'] == $needle['id']) {
    unset($stack[$k]);
    array_unshift($stack, $needle);
    break;
  } else {
    //echo 'No matching element in existing array.';
  }
}
print_r($testArray);

输出将是：

Array
(
    [0] => Array
        (
            [id] => 50575
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 3248
        )

    [1] => Array
        (
            [id] => 53295
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2954
        )

    [2] => Array
        (
            [id] => 53323
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2954
        )

    [3] => Array
        (
            [id] => 53391
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2954
        )

    [4] => Array
        (
            [id] => 53402
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2954
        )

    [5] => Array
        (
            [id] => 57130
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2980
        )

    [6] => Array
        (
            [id] => 57142
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 3248
        )

    [7] => Array
        (
            [id] => 50601
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 3248
        )

    [8] => Array
        (
            [id] => 56113
            [name] => Funbox - Pirates and Princesses
            [venue_id] => 2882
        )

)

【讨论】：

我刚刚复制了您的输出代码。如果是字符串，则需要用引号将数组键和值包装起来。类似于我对$needle 所做的事情。 $stack 也应该是这样的。如果是这样，错误是什么？