dragon8837
2018-08-15 11:17
浏览 86
已采纳

PHP:如何按键合并两个嵌套数组

I have two arrays like:

$team = [
    ['id' => 1, 'name' => 'Team A'],
    ['id' => 2, 'name' => 'Team B'],
    ['id' => 3, 'name' => 'Team C'], 
]; 

$people = [
    ['id' => 1, 'name' => 'Mark Hamill', 'team' => 1],
    ['id' => 2, 'name' => 'Nicolas Cage', 'team' => 2],
    ['id' => 3, 'name' => 'Tom Cruise', 'team' => 3],
    ['id' => 4, 'name' => 'Tom Hanks', 'team' => 1],
    ['id' => 5, 'name' => 'Brad Pitt', 'team' => 2],
    ['id' => 6, 'name' => 'Paul Smith', 'team' => 3],
    ['id' => 7, 'name' => 'Matt Daemon', 'team' => 1],
    ['id' => 8, 'name' => 'Robert Redford', 'team' => 2],
]  

I would like to merge the $people array into the $team array as a child node based on the team id. So the result would be:

$team = [
    [
        'id' => 1, 
        'name' =>'Team A',
        'members' => [
            ['id' => 1, 'name' => 'Mark Hamill', 'team' => 1],
            ['id' => 4, 'name' => 'Tom Hanks', 'team' => 1],
            ['id' => 7, 'name' => 'Matt Daemon', 'team' => 1],
        ]
    ],
    [
        'id' => 2, 
        'name' =>'Team B',
        'members' => [
            ['id' => 2, 'name' => 'Nicolas Cage', 'team' => 2],
            ['id' => 5, 'name' => 'Brad Pitt', 'team' => 2],
            ['id' => 8, 'name' => 'Robert Redford', 'team' => 2],
        ]
    ],
    [
        'id' => 3, 
        'name' =>'Team C',
        'members' => [
            ['id' => 3, 'name' => 'Tom Cruise', 'team' => 3],
            ['id' => 6, 'name' => 'Paul Smith', 'team' => 3],
        ]
    ], 
]; 

I know I can loop through $team and add the relevant $people one at a time based on their 'team' id, but I was wondering if there was a more efficient way of doing this. In my project, either of the arrays could grow to contain up to around 50 items each and processing these one at a time is really slowing the page down.

Thanks

2条回答 默认 最新

相关推荐 更多相似问题