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@ 2020-07-06T02:55:21Z

<?php

$arr = [
  [
    "menu_id" => 7,
    "menu_name" => "Kasagbutan Meals",
    "menu_price" => "100.00",
    "qty" => "1",
    "special_instructions" => ""
  ],
  [
    "menu_id" => 7,
    "special_instructions" => "",
    "menu_name" => "Kasagbutan Meals",
    "menu_price" => "100.00",
    "qty" => "1",
    
  ],
  [
    "menu_id" => 6,
    "menu_name" => "Coke",
    "menu_price" => "50.00",
    "qty" => "1",
    "special_instructions" => ""
  ]
];

$exclude = array_flip(['qty']);

$totals = array_reduce($arr, function($totals, $item) use ($exclude) {
    $id = array_diff_key($item, $exclude);
    ksort($id);
    $hash = crc32(json_encode($id));
    if (array_key_exists($hash, $totals)) {
        $totals[$hash]['qty'] += $item['qty'];
    } else {
        $totals[$hash] = $item;
    }
    return $totals;
}, []);

print_r($totals);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [2369868709] => Array ( [menu_id] => 7 [menu_name] => Kasagbutan Meals [menu_price] => 100.00 [qty] => 2 [special_instructions] => ) [1141584172] => Array ( [menu_id] => 6 [menu_name] => Coke [menu_price] => 50.00 [qty] => 1 [special_instructions] => ) )

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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