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@ 2018-12-27T07:28:51Z

<?php
$data = [ ['code'=>'aaa','name'=>'a','qty'=>20,'price'=>12.00],
['code'=>'bbb','name'=>'b','qty'=>20,'price'=>12.00],
['code'=>'ccc','name'=>'c','qty'=>20,'price'=>12.00],
['code'=>'aaa','name'=>'a','qty'=>20,'price'=>12.00],
['code'=>'ddd','name'=>'d','qty'=>20,'price'=>12.00],
['code'=>'ccc','name'=>'c','qty'=>5,'price'=>8.00],
['code'=>'bbb','name'=>'b','qty'=>15,'price'=>10.00],
['code'=>'ggg','name'=>'g','qty'=>20,'price'=>12.00] ];
$newdata = array_reduce(array_slice($data, 1),
    function ($c, $v) { 
        if (($k = array_search($v['code'], array_column($c, 'code'))) !== false) {
            $c[$k]['qty'] += $v['qty'];
            $c[$k]['price'] += $v['price'];
        }
        else {
            $c[] = $v;
        }
        return $c;
    }, array($data[0]));
print_r($newdata);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [0] => Array ( [code] => aaa [name] => a [qty] => 40 [price] => 24 ) [1] => Array ( [code] => bbb [name] => b [qty] => 35 [price] => 22 ) [2] => Array ( [code] => ccc [name] => c [qty] => 25 [price] => 20 ) [3] => Array ( [code] => ddd [name] => d [qty] => 20 [price] => 12 ) [4] => Array ( [code] => ggg [name] => g [qty] => 20 [price] => 12 ) )

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2022-12-01 RFC: Property hooks - included in PHP 8.4
2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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