Merge 2 rows into one filling empty fields - php

Question

So, I have been searching but I could not find something similair.
What I need is to merge 2 rows what I got from DB (stored in an Array) and fill out empty fields.
We have 2 keys FIXED and WEIGHT and they have different values in columns. If we use FIXED type we do not use values from WEIGHT and those columns are empty, now I have to merge those 2 2rows into one.
There is N rows (but always in pair).
Here is example
id type postal fix_price weight_price our_price your_price product_id group_id
1 fixed 8888 50 - 50 - 1 2
2 weight 8888 - 100 - 100 1 2
3 fixed 7777 20 - 20 - 1 2
4 weight 7777 - 30 - 30 1 2
And I need result like below:
id postal fix_price weight_price our_price your_price product_id group_id
1 8888 50 100 50 100 1 2
2 7777 20 30 20 30 1 2
Thank you for helping!

Answer 1

Try:
$collect=array();
$useType='fixed';
foreach($array as $set){
$check=$set['type'];
unset($set['type']);
if(!isset($collect[$set['postal']])) {
$collect[$set['postal']] = $set;
} else {
foreach($set as $k=>$v){
if($k=='id' && $check!=$useType) {
continue;
}
if(!empty($v)){
$collect[$set['postal']][$k] = $v;
}
}
}
}
$collect=array_values($collect);
var_export($collect);
This produces your expacted result, but i dont thing that is what you really want.

Answer 2

I don't really understand how your question is related with the (very different) data structure you shared in your comment under the #JustOnUnderMillions answer, so here is an answer based on the structure suggested by your initial question.
Taking advantage of your other comment where you say "I have tried with $arra1 + $array2" I guess you're able to first format the source data like this:
$fixed = [
8888 => [50, NULL, 50, NULL, 1, 2],
7777 => [20, NULL, 20, NULL, 1, 2],
];
$weight = [
8888 => [NULL, 100, NULL, 100, 1, 2],
7777 => [NULL, 30, NULL, 30, 1, 2],
];
Then it's pretty easy to use this simple code:
foreach ($fixed AS $postal => $fixed_data) {
$weight_data = $weight[$postal];
foreach ($fixed_data AS $key => $fixed_value) {
$all[$postal][$key] = $fixed_value ? $fixed_value : $weight_data[$key];
}
}
which gives the expected result:
echo '<pre>' . print_r($all, TRUE) . '</pre>';
/*
Array
(
[8888] => Array
(
[0] => 50
[1] => 100
[2] => 50
[3] => 100
[4] => 1
[5] => 2
)
[7777] => Array
(
[0] => 20
[1] => 30
[2] => 20
[3] => 30
[4] => 1
[5] => 2
)
)
*/