PHP / Laravel多维数组

Question

what I would like to ask is - I'm working on some stock application where you can have more than one stock and at the same time, you can have one item in 2 or more different stocks. So there is the problem. I'm saving my items data to arrays like this one

 $cart[$data->resource_id] = array
 (
 'resID' => $data->resource_id,
 'stoID' => $data->stock_id,
 'stoName' => $data->sto_name,
 'resName' => $data->res_name,
 'actQuantity' => $data->quantity,
 'minimum' => $data->minimum,
 'quantity' => $quant
 );

but what I need to do now is to save my data to array with something with 2 indexes(?). First index - resource_id, secound stock_id - so I know with item it is and on with stock it is. So I think something like this

 $cart[$data->resource_id, $data->stock_id] = array
 (
 'resID' => $data->resource_id,
 'stoID' => $data->stock_id,
 'stoName' => $data->sto_name,
 'resName' => $data->res_name,
 'actQuantity' => $data->quantity,
 'minimum' => $data->minimum,
 'quantity' => $quant
 );

but its obviously not correct code.

Do you have guys any ideas on how to do this?

Thank you so, so much.

Answer 1

You select it by $cart[$data->resource_id][$data->stock_id] , so without comma. To set the value you can type

$cart[$data->resource_id][$data->stock_id] = [
   'stoName' => $data->sto_name,
   'resName' => $data->res_name
];

Answer 2

php multidimensional array: define:

$cars =
    [
        ["Volvo", 22, 18,[2018,19,5]],
        ["BMW", 15, 13,[2018,10,2]],
        ["Saab", 5, 2,[2018,20,5]],
        ["Land Rover", 17, 1,[2018,19,6]]
    ];

use:

echo $cars[0][0].": In stock: ".$cars[0][1].", sold: ".$cars[0][2].", manufactured(year): ".$cars[0][3][0].".<br>";
echo $cars[1][0].": In stock: ".$cars[1][1].", sold: ".$cars[1][2].", manufactured(year): ".$cars[0][3][0].".<br>";
echo $cars[2][0].": In stock: ".$cars[2][1].", sold: ".$cars[2][2].", manufactured(year): ".$cars[0][3][0].".<br>";
echo $cars[3][0].": In stock: ".$cars[3][1].", sold: ".$cars[3][2].", manufactured(year): ".$cars[0][3][0].".<br>";

in your code:

 $cart[$data->resource_id][$data->stock_id]

Answer 3

You can create array like below.

$cart[$data->resource_id] = [ 
    $data->stock_id => [

        'resID' => $data->resource_id,
        'stoID' => $data->stock_id,
        'stoName' => $data->sto_name,
        'resName' => $data->res_name,
        'actQuantity' => $data->quantity,
        'minimum' => $data->minimum,
        'quantity' => $quant
    ] 
]

Answer 4

PHP do not support multi dimensional arrays, at least not as you want.

To do multi dimensional arrays on PHP, you must use nested arrays:

$a = [
    "keyA" => [
        "keyB" => 'somedata';
    ]
]

So you need to initialize the array:

$cart = [];

$cart[$data->resource_id] = []; // Do this just in the first time that you insert something inside that `resource_id`, otherwise you will resetting the array.

$cart[$data->resource_id][$data->stock_id] = [
    //... your data here ...
]

For example, imagine that you want to get this data:

$input = [
    [ 'id' => 1, 'stock_id' => 1, 'name' => 'foo' ],
    [ 'id' => 1, 'stock_id' => 2, 'name' => 'bar' ],
    [ 'id' => 1, 'stock_id' => 3, 'name' => 'biz' ],
]

And organize it by id and stock_id .

You should do a script like this:

$output =  [];

foreach ($input as $item) {
    if (!array_key_exists($item['id'], $output)) {
        $output[$item['id']] = []; // Initializing the 2nd level array
    }

    $output[$item['id']][$item['stock_id']] = $item;
}

The $output array will look look like this:

[
    1 => [
        1 => [ 'id' => 1, 'stock_id' => 1, 'name' => 'foo' ],
        2 => [ 'id' => 1, 'stock_id' => 2, 'name' => 'bar' ],
        3 => [ 'id' => 1, 'stock_id' => 3, 'name' => 'biz' ],
    ]
]

So you can access the data like this:

echo $output[1][3]['name']
// Will output `biz`