<?php
$array = [
['_id' => '5f76b1788ee23077dccd1a2c', 'product' => ['_id'=>'5d0391a4a72ffe76b8fcc610'], 'count'=> 1],
['_id' => '5f76b6288ee2300700cd1a3a', 'product' => ['_id'=>'5d0391b6a72ffe76b8fcc611'], 'count'=> 1],
['_id' => '5f76d2488ee23083d3cd1a4a', 'product' => ['_id'=>'5d0391b6a72ffe76b8fcc611'], 'count'=> 1]
];
$productCounts = [];
foreach ($array as $item) {
$productId = $item['product']['_id'];
$productCounts[$productId] = ($productCounts[$productId] ?? 0) + $item['count'];
}
var_export($productCounts);
- Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
- array (
'5d0391a4a72ffe76b8fcc610' => 1,
'5d0391b6a72ffe76b8fcc611' => 2,
)
preferences:
139.41 ms | 407 KiB | 5 Q