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<?php $foods = [ [ 'foodType' => 'fruits', 'itemID' => 1, 'itemName' => 'apple', ], [ 'foodType' => 'fruits', 'itemID' => 2, 'itemName' => 'banana', ], [ 'foodType' => 'veggies', 'itemID' => 3, 'itemName' => 'carrot', ], [ 'foodType' => 'veggies', 'itemID' => 4, 'itemName' => 'broccoli', ] ]; $grouped_foods = []; $groupByColumn = 'foodType'; array_filter($foods, function ($foodItem) use(&$grouped_foods, $groupByColumn) { $grouped_foods[$foodItem[$groupByColumn]][] = array_filter($foodItem, function ($key) use($groupByColumn) { return $key != $groupByColumn; }, ARRAY_FILTER_USE_KEY); }); echo "<pre>"; print_R($grouped_foods); echo "</pre>";
Output for 7.1.0 - 7.1.33, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
<pre>Array ( [fruits] => Array ( [0] => Array ( [itemID] => 1 [itemName] => apple ) [1] => Array ( [itemID] => 2 [itemName] => banana ) ) [veggies] => Array ( [0] => Array ( [itemID] => 3 [itemName] => carrot ) [1] => Array ( [itemID] => 4 [itemName] => broccoli ) ) ) </pre>

preferences:
175.09 ms | 404 KiB | 218 Q