两个二维数组进行归类

Array
(
    [0] => Array
        (
            [id] => 9079
            [user_id] => 8677
            [status] => 3
            [context] => 
            [city] => 上海市
            [location] => 
            [created_at] => 1631084306
            [diamond_reward] => 0
            [file_num] => 3
            [visible_type] => 1
        )

    [1] => Array
        (
            [id] => 9077
            [user_id] => 9201
            [status] => 3
            [context] => 哈哈哈哈
            [city] => 上海市
            [location] => 
            [created_at] => 1628471456
            [diamond_reward] => 30
            [file_num] => 2
            [visible_type] => 1
        )

    [2] => Array
        (
            [id] => 9076
            [user_id] => 9207
            [status] => 3
            [context] => 刚刚好
            [city] => 上海市
            [location] => 
            [created_at] => 1628471330
            [diamond_reward] => 420
            [file_num] => 3
            [visible_type] => 1
        )

    [3] => Array
        (
            [id] => 9072
            [user_id] => 8842
            [status] => 3
            [context] => 
            [city] => 上海市
            [location] => 
            [created_at] => 1625377677
            [diamond_reward] => 0
            [file_num] => 3
            [visible_type] => 1
        )

    [4] => Array
        (
            [id] => 9070
            [user_id] => 7883
            [status] => 3
            [context] => 
            [city] => 上海市
            [location] => 
            [created_at] => 1625131169
            [diamond_reward] => 0
            [file_num] => 3
            [visible_type] => 1
        )

)

Array
(
    [0] => Array
        (
            [file_id] => 3B2F0C78-FC6C-5317-9007-9B5968D1CF32.png
            [type] => 1
            [file_url] => 3B2F0C78-FC6C-5317-9007-9B5968D1CF32.png
            [sort] => 0
            [width] => 828
            [height] => 1794
            [duration] => 0
            [moment_id] => 9070
        )

    [1] => Array
        (
            [file_id] => F6AC3AC5-0DD7-783B-4A6E-98F27AE49C96.png
            [type] => 1
            [file_url] => F6AC3AC5-0DD7-783B-4A6E-98F27AE49C96.png
            [sort] => 1
            [width] => 828
            [height] => 1794
            [duration] => 0
            [moment_id] => 9070
        )

    [2] => Array
        (
            [file_id] => 8652CE5F-2069-28C1-A992-5C5FF6262F60.png
            [type] => 1
            [file_url] => 8652CE5F-2069-28C1-A992-5C5FF6262F60.png
            [sort] => 2
            [width] => 1104
            [height] => 828
            [duration] => 0
            [moment_id] => 9070
        )

    [3] => Array
        (
            [file_id] => C63CC0FB-F3AD-D337-75BA-54E7E27D9800.png
            [type] => 1
            [file_url] => C63CC0FB-F3AD-D337-75BA-54E7E27D9800.png
            [sort] => 0
            [width] => 828
            [height] => 1794
            [duration] => 0
            [moment_id] => 9072
        )

    [4] => Array
        (
            [file_id] => 071FDC1A-5FFB-2C50-592C-2B37EEE2DDE9.png
            [type] => 1
            [file_url] => 071FDC1A-5FFB-2C50-592C-2B37EEE2DDE9.png
            [sort] => 1
            [width] => 828
            [height] => 1794
            [duration] => 0
            [moment_id] => 9072
        )

    [5] => Array
        (
            [file_id] => 9258ED6A-72BE-59BA-7A18-25F3BD528EEB.png
            [type] => 1
            [file_url] => 9258ED6A-72BE-59BA-7A18-25F3BD528EEB.png
            [sort] => 2
            [width] => 828
            [height] => 1794
            [duration] => 0
            [moment_id] => 9072
        )

    [6] => Array
        (
            [file_id] => B0D45781-F6A8-5464-636E-F3BEB147D7FA.png
            [type] => 1
            [file_url] => B0D45781-F6A8-5464-636E-F3BEB147D7FA.png
            [sort] => 0
            [width] => 640
            [height] => 500
            [duration] => 0
            [moment_id] => 9076
        )

    [7] => Array
        (
            [file_id] => 5E3A5A27-A0FD-861B-F43B-5F5C8C215E0F.png
            [type] => 1
            [file_url] => 5E3A5A27-A0FD-861B-F43B-5F5C8C215E0F.png
            [sort] => 1
            [width] => 640
            [height] => 881
            [duration] => 0
            [moment_id] => 9076
        )

    [8] => Array
        (
            [file_id] => 1858E76E-EBCC-4617-0E9A-8A2DEC2A1646.png
            [type] => 1
            [file_url] => 1858E76E-EBCC-4617-0E9A-8A2DEC2A1646.png
            [sort] => 2
            [width] => 640
            [height] => 903
            [duration] => 0
            [moment_id] => 9076
        )

    [9] => Array
        (
            [file_id] => D97DE8D2-5EB6-83A5-E8CE-49D66520E01B.png
            [type] => 1
            [file_url] => D97DE8D2-5EB6-83A5-E8CE-49D66520E01B.png
            [sort] => 0
            [width] => 720
            [height] => 866
            [duration] => 0
            [moment_id] => 9077
        )

    [10] => Array
        (
            [file_id] => 0A57F0E7-A599-871C-EC91-ACA31976D9B5.png
            [type] => 1
            [file_url] => 0A57F0E7-A599-871C-EC91-ACA31976D9B5.png
            [sort] => 1
            [width] => 1104
            [height] => 828
            [duration] => 0
            [moment_id] => 9077
        )

    [11] => Array
        (
            [file_id] => 1F69EDF7-50EC-4ED6-2980-F0BE751B31B5.png
            [type] => 1
            [file_url] => 1F69EDF7-50EC-4ED6-2980-F0BE751B31B5.png
            [sort] => 0
            [width] => 390
            [height] => 366
            [duration] => 0
            [moment_id] => 9079
        )

    [12] => Array
        (
            [file_id] => 72CF5D7D-C00A-A9DA-075B-21ED5B4AFCA5.png
            [type] => 1
            [file_url] => 72CF5D7D-C00A-A9DA-075B-21ED5B4AFCA5.png
            [sort] => 1
            [width] => 399
            [height] => 369
            [duration] => 0
            [moment_id] => 9079
        )

    [13] => Array
        (
            [file_id] => 6AB9B324-95DA-C00D-4B73-706EB1E1EC75.png
            [type] => 1
            [file_url] => 6AB9B324-95DA-C00D-4B73-706EB1E1EC75.png
            [sort] => 2
            [width] => 366
            [height] => 354
            [duration] => 0
            [moment_id] => 9079
        )

)

将第二个数组中moment_id与第一个数组中id一致的数据进行归类

第一个数组为：$data1

第二个数组为：$data2

处理方式：

$new_moment_file_list = [];
for ($i=0;$i<count($data2);$i++){
    $new_moment_file_list[$data2[$i]['moment_id']][] = $data2[$i];
}
unset($data2);

foreach ($data1 as $key=>$value){
　　

　　$data1[$key]['files'] = [];
　　if(!empty($new_moment_file_list[$value['id']])){
    　　$data1[$key]["files"] = $new_moment_file_list[$value['id']];
　　}

}