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<?php $array = [ [ ["ID" => 2, "vendor_id" => "37", "order_id" => 776], ], [ ["ID" => 2, "vendor_id" => "37", "order_id" => 786], ] ]; $result = []; foreach ($array as $group) { foreach ($group as $row) { $result[$row['order_id']][] = $row; } } var_export($result);
Output for git.master, git.master_jit, rfc.property-hooks
array ( 776 => array ( 0 => array ( 'ID' => 2, 'vendor_id' => '37', 'order_id' => 776, ), ), 786 => array ( 0 => array ( 'ID' => 2, 'vendor_id' => '37', 'order_id' => 786, ), ), )

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