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@ 2023-02-21T12:34:40Z

<?php

$jsonString = '[{"id":1,"category":"Pizza","product":"Large Pizza","complement_type":"Bread","option":"Brown bread"},{"id":2,"category":"Pizza","product":"Small Pizza","complement_type":"Bread","option":"White bread"},{"id":3,"category":"Pizza","product":"Small Pizza","complement_type":"Ingredients","option":"Olives"},{"id":4,"category":"Salads","product":"Green Salad","complement_type":"Extras","option":"Bacon"},{"id":5,"category":"Salads","product":"Cesars Salad","complement_type":"Extras","option":"Lettuce"}]';
$array = json_decode($jsonString);

$result = array();
foreach ($array as $row) {
    if (!isset($result[$row->category])) {
        $result[$row->category] = array();
    }
    if (!isset($result[$row->category][$row->product])) {
        $result[$row->category][$row->product] = array();
    }
    $result[$row->category][$row->product][$row->complement_type] = $row->option;
}

print_r($result);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [Pizza] => Array ( [Large Pizza] => Array ( [Bread] => Brown bread ) [Small Pizza] => Array ( [Bread] => White bread [Ingredients] => Olives ) ) [Salads] => Array ( [Green Salad] => Array ( [Extras] => Bacon ) [Cesars Salad] => Array ( [Extras] => Lettuce ) ) )

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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