group mysql results in multidimensional array - php

Question

I have the following:
$variants = [
0 => [
"variant_name" => "iPhone 5",
"sku_id" => "2",
"sku" => "GLC-IPH5REDXXXL",
"stock_total" => "10",
"stock_left" => "10",
"retail_price" => 1000,
"on_sale_price" => 0
],
1 => [
"variant_name" => "Red",
"sku_id" => "2",
"sku" => "GLC-IPH5REDXXXL",
"stock_total" => "10",
"stock_left" => "10",
"retail_price" => 1000,
"on_sale_price" => 0
],
2 => [
"variant_name" => "iPhone 6s Plus",
"sku_id" => "4",
"sku" => "GLC-IPH6SP",
"stock_total" => "5",
"stock_left" => "5",
"retail_price" => 1000,
"on_sale_price" => 0
],
3 => [
"variant_name" => "iPhone 6s",
"sku_id" => "13",
"sku" => "GLC-IPH6S",
"stock_total" => "5",
"stock_left" => "5",
"retail_price" => 1000,
"on_sale_price" => 0
]
]
I would like to put them in the following array
0 => [
"sku_id" => "2",
"sku" => "GLC-IPH5REDXXXL",
"stock_total" => "10",
"stock_left" => "10",
"retail_price" => 1000,
"on_sale_price" => 0,
"options" => ['iPhone 4', 'Red'],
"option1" => 'iPhone4',
"option2" => 'Red',
"option3" => null
],
1 => [
"sku_id" => "4",
"sku" => "GLC-IPH6SP",
"stock_total" => "5",
"stock_left" => "5",
"retail_price" => 1000,
"on_sale_price" => 0,
"options" => ['iPhone 6s Plus'],
"option1" => 'iPhone 6s Plus',
"option2" => null,
"option3" => null
],
2 => [
"sku_id" => "13",
"sku" => "GLC-IPH6S",
"stock_total" => "5",
"stock_left" => "5",
"retail_price" => 1000,
"on_sale_price" => 0,
"options" => ['iPhone 6s'],
"option1" => 'iPhone 6s',
"option2" => null,
"option3" => null
]
I can't fill the options with each variant_name
I can't set the option1, option2, option3 with each corresponding variant_name
I've tried a simple foreach($variants as $v) loop on the first array and I got it working until options, option1, option2, option3 from which I get the repeating values.
I just can't figure it out how to do it, any suggestions?

Answer 1

You could use a simple foreach() and perhaps a for(). The for() here is a little inefficient because it runs every time, so it's highly repetitive and continually overwrites...but it works:
foreach($variants as $rows) {
$sku[$rows['sku_id']]['sku_id'] = $rows['sku_id'];
$sku[$rows['sku_id']]['sku'] = $rows['sku'];
$sku[$rows['sku_id']]['stock_total'] = $rows['stock_total'];
$sku[$rows['sku_id']]['stock_left'] = $rows['stock_left'];
$sku[$rows['sku_id']]['retail_price'] = $rows['retail_price'];
$sku[$rows['sku_id']]['on_sale_price'] = $rows['on_sale_price'];
$sku[$rows['sku_id']]['options'][] = $rows['variant_name'];
for($i = 0; $i < 3; $i++)
$sku[$rows['sku_id']]['option'.($i+1)] = (isset($sku[$rows['sku_id']]['options'][$i]))? $sku[$rows['sku_id']]['options'][$i] : NULL;
}
echo print_r(array_values($sku));
Gives you:
Array
(
[0] => Array
(
[sku] => GLC-IPH5REDXXXL
[stock_total] => 10
[stock_left] => 10
[retail_price] => 1000
[on_sale_price] => 0
[options] => Array
(
[0] => iPhone 5
[1] => Red
)
[option1] => iPhone 5
[option2] => Red
[option3] =>
)
[1] => Array
(
[sku] => GLC-IPH6SP
[stock_total] => 5
[stock_left] => 5
[retail_price] => 1000
[on_sale_price] => 0
[options] => Array
(
[0] => iPhone 6s Plus
)
[option1] => iPhone 6s Plus
[option2] =>
[option3] =>
)
[2] => Array
(
[sku] => GLC-IPH6S
[stock_total] => 5
[stock_left] => 5
[retail_price] => 1000
[on_sale_price] => 0
[options] => Array
(
[0] => iPhone 6s
)
[option1] => iPhone 6s
[option2] =>
[option3] =>
)
)

Answer 2

Solution
$result = [];
foreach($variants as $v) {
$result[$v['sku_id']]['sku_id'] = $v['sku_id'];
$result[$v['sku_id']]['sku'] = $v['sku'];
$result[$v['sku_id']]['stock_left'] = $v['stock_left'];
$result[$v['sku_id']]['retail_price'] = price($v['retail_price']);
$result[$v['sku_id']]['options'][] = $v['variant_name'];
if(isset($result[$v['sku_id']]['options'][0])) {
$result[$v['sku_id']]['option1'] = $result[$v['sku_id']]['options'][0];
}
else {
$result[$v['sku_id']]['option1'] = null;
}
if(isset($result[$v['sku_id']]['options'][1])) {
$result[$v['sku_id']]['option2'] = $result[$v['sku_id']]['options'][1];
}
else {
$result[$v['sku_id']]['option2'] = null;
}
if(isset($result[$v['sku_id']]['options'][2])) {
$result[$v['sku_id']]['option3'] = $result[$v['sku_id']]['options'][2];
}
else {
$result[$v['sku_id']]['option3'] = null;
}
}
return $result;