是否存在将关联数组转换为数字数组的最小方法，每个项目都存储键和值？

Question

I simply need to convert, in PHP:

[
    'id' => '1',
    'code' => 'DRX',
    'company_name' => 'Dave Ricks Ltd'
], 
[
    'id' => '2',
    'code' => 'LRT',
    'company_name' => 'LiveRave Ltd'
]

To...

[
    [
        [
            'name' => 'id',
            'value' => '1',
        ],
        [
            'name' => 'code',
            'value' => 'DRX',
        ],
        [
            'name' => 'company_name',
            'value' => 'Dave Ricks Ltd',
        ]
    ], 
    [
        [
            'name' => 'id',
            'value' => '2',
        ],
        [
            'name' => 'code',
            'value' => 'LRT',
        ],
        [
            'name' => 'company_name',
            'value' => 'LiveRave Ltd',
        ]
    ]
]

I know I can do this with a couple of foreach loops but wondered if using some of PHPs array functions I could do the same with less lines of code?

Answer 1

I'm assuming your initial array is actually

[
  [
    'id' => '1', 'code' => 'DRX', 'company_name' => 'Dave Ricks Ltd'
  ],
  [
    'id' => '2', 'code' => 'LRT', 'company_name' => 'LiveRave Ltd'
  ]
]

since that's the kind of thing you'd get from a database. If I'm wrong and you've posted the actual var_dump/print_r of the array, that's very strange, but we can add a step to reorganize it.

So all we need to do is

$input = [
    [
        'id' => '1',
        'code' => 'DRX',
        'company_name' => 'Dave Ricks Ltd',
    ], 
    [
        'id' => '2',
        'code' => 'LRT',
        'company_name' => 'LiveRave Ltd',
    ]
];

$output = array_map(function($elem) { 

    return [
        ['name' => 'id', 'value' => $elem['id'] ],
        ['name' => 'code', 'value' => $elem['code'] ],
        ['name' => 'company_name', 'value' => $elem['company_name'] ],
    ];

}, $input);
print_r($output);

If you want the conversion more generic:

$output = array_map(function($elem) { 

    $result = [];
    foreach ($elem as $key => $value) {
        $result[] = ['name' => $key, 'value' => $value];
    }
    return $result;

}, $input);
print_r($output);

I'm thinking about whether there's an way to remove that inner foreach - but I don't think there is one that's worth the effort.