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<?php $array = array( array('delivery_plan' => '80::2020/07', 'additional_amount_usd' => 32.88), array('delivery_plan' => '80::2020/09', 'additional_amount_usd' => 16.44), array('delivery_plan' => '80::2020/07', 'additional_amount_usd' => 32.88), ); $sum_array = []; foreach ($array as $item) { if (!isset($sum_array[$item['delivery_plan']])) { // initialization $sum_array[$item['delivery_plan']] = ['delivery_plan' => $item['delivery_plan'], 'additional_amount_usd' => 0.0]; } $sum_array[$item['delivery_plan']]['additional_amount_usd'] += $item['additional_amount_usd']; } $sum_array = array_values($sum_array); print_r($sum_array);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( [delivery_plan] => 80::2020/07 [additional_amount_usd] => 65.76 ) [1] => Array ( [delivery_plan] => 80::2020/09 [additional_amount_usd] => 16.44 ) )

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