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@ 2019-06-13T14:00:14Z

<?php
$products = [
    (object)["item_id"    => "89",
     "name"       => "Confiture de Myrtilles",
     "product_id" => "737",
     "meta_key"   => "vmm_warehouse_sg_10783",
     "meta_value" => "0"
    ],
    (object)["item_id"    => "89",
     "name"       => "Confiture de Myrtilles",
     "product_id" => "737",
     "meta_key"   => "vmm_warehouse_sg_10782",
     "meta_value" => "0"
    ],
    (object)["item_id"    => "91",
     "name"       => "Poires Guyot (bio)",
     "product_id" => "690",
     "meta_key"   => "_backorders",
     "meta_value" => "no"
    ],
    (object)["item_id"    => "91",
     "name"       => "Poires Guyot (bio)",
     "product_id" => "690",
     "meta_key"   => "_sold_individually",
     "meta_value" => "no"
    ]
];

$result = [];
foreach($products as $product) {
    $result[$product->item_id][$product->meta_key] = $product->meta_value; 
}
   
var_export($result);

Output for git.master, git.master_jit, rfc.property-hooks: array ( 89 => array ( 'vmm_warehouse_sg_10783' => '0', 'vmm_warehouse_sg_10782' => '0', ), 91 => array ( '_backorders' => 'no', '_sold_individually' => 'no', ), )

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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