Multi-array idea php - php

Question

I have a PHP array thats like this:
$a1 = [
[ 'buyer'=>"ACME", 'fees1'=>"100", 'seller'=>"XYZ plc", 'fees2'=>"200", 'item'=>"Bricks" ],
[ 'buyer'=>"ACME", 'fees1'=>"110", 'seller'=>"XYZ plc", 'fees2'=>"220", 'item'=>"Bricks" ],
[ 'buyer'=>"XYZ Plc", 'fees1'=>"200", 'seller'=>"ACME", 'fees2'=>"300", 'item'=>"Cement" ],
/* and so on and on */
];
So the report I am trying to produce is this:
BRICKS---CEMENT
ACME----220------300
XYZ-----440------200
--------------------
660------500
I am out of my wits trying the best possible way to iterate it. As of now I have managed to filter out the UNIQUE buyers and sellers and items into separate arrays. Any help/tip will be much appreciated.
Thanks ahead

Answer 1

There's most likely a more elegant solution, but anyway
<?php
$dataset = [
[ 'buyer'=>"ACME", 'fees1'=>"100", 'seller'=>"XYZ plc", 'fees2'=>"200", 'item'=>"Bricks" ],
[ 'buyer'=>"ACME", 'fees1'=>"110", 'seller'=>"XYZ plc", 'fees2'=>"220", 'item'=>"Bricks" ],
[ 'buyer'=>"XYZ plc", 'fees1'=>"200", 'seller'=>"ACME", 'fees2'=>"300", 'item'=>"Cement" ],
/* and so on and on */
];
$columns = array_unique(array_column($dataset, 'item'));
//sort($columns);
// create a template with all possible items (as key) and value 0
$template = array_combine(
$columns,
array_pad( array(), count($columns), 0)
);
$result = [];
foreach( $dataset as $row ) {
// if we haven't seen this seller before
if ( !isset($result[ $row['seller'] ]) ) {
// create a template with all possible items but each having 0-value
$result[ $row['seller'] ] = $template;
}
// same for buyer
if ( !isset($result[ $row['buyer'] ]) ) {
$result[ $row['buyer'] ] = $template;
}
// now comes the tricky part
// remember: $result[$row['seller']] === array('Bricks'=>sumFeeBricks, 'Cemtent'=>sumFeeCement)
// i.e. $result[$row['seller']]['Cemtent'] += <something> increases sumFeeCement in the array representing the seller in $result
// $row['item'] tells you which element within $result[$row['seller']] you want to increase
// ==> $result[$row['seller']][$row['item']] += ....
// increase sumFee of the sold item by fee2 for the seller
$result[$row['seller']][ $row['item'] ] += $row['fees2'];
// increase sumFee of the sold item by fee1 for the buyer
$result[$row['buyer']][ $row['item'] ] += $row['fees1'];
}
var_export($result);

Answer 2

Just iterate over the array creating a new multidimensional one. No need to translate the givven array directly to the desired output.

Answer 3

I came with an idea of solving it, if you don't have such a function like array_column (i.e. PHP 5.4.10)
<?php
// we assume, the data is organised in such a way: first buyer/seller/whatever then fees1/fees2/etc, item can be at the end or beginning
$a1 = [
[ 'buyer'=>"ACME", 'fees1'=>"100", 'seller'=>"XYZ plc", 'fees2'=>"200", 'item'=>"Bricks" ],
[ 'buyer'=>"ACME", 'fees1'=>"110", 'seller'=>"XYZ plc", 'fees2'=>"220", 'item'=>"Bricks" ],
[ 'buyer'=>"XYZ Plc", 'fees1'=>"200", 'seller'=>"ACME", 'fees2'=>"300", 'item'=>"Cement" ],
/* and so on and on */
];
function process($obj, $arr){ // we process a single row of $a1
$data = array(); // first we create an indexed array for storing a single key and its value
foreach($obj as $key=>$val){
$key = strtolower($key);
$val = strtolower($val);
$data[] = array($key=>$val);
}
for($i=0;$i<sizeof($data);$i++){ // we iterate over this array
$key = array_pop(array_keys($data[$i])); // we've got current key
$val = $data[$i][$key]; // we've got current value, company
if(preg_match("/buyer|seller/", $key)){ // if it's seller or buyer or whatever we want just edit
$next_key = array_pop(array_keys($data[$i+1])); // we take the next element of $data which is $key=>$value, next key i.e. fees1
$next_val = $data[$i+1][$next_key]; // we take its value e.g. 100
$arr[$val]+=$next_val; // we put the money for company, and adding them up
}
}
return $arr; // the end of processing a single row of $a1
}
$data = array(); // first we create the data split into items buckets
foreach($a1 as $obj){
foreach($obj as $key=>$val){
$key = strtolower($key); // ACME or AcMe, no difference
$val = strtolower($val);
if(preg_match("/item/", $key)){
$data[$val][] = $obj;
}
}
}
print_r($data);
$final = array(); // we store the result for items
foreach($data as $item=>$obj){ // we iterate over items
$arr = array(); // variable for one item, for next we'll start from empty array
foreach($obj as $val){ // we process each row for item
$arr = process($val, $arr);
}
$final[$item] = $arr; // we put processed data to key which is item
}
$total = array(); // we store the total result
foreach($final as $val){
foreach($val as $key=>$prize){
$total[$key]+=$prize; // we add up all money for a single company
}
}
print_r($final);
print_r($total);
?>