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<?php $a = array('aa'=>10, 'bb'=>2, 'cc'=>5); $b = array('aa'=>1, 'bb'=>20, 'dd'=>11); $c = array('aa'=>3); $d = array('ee'=>5); $arr = [$a,$b,$c,$d]; $keys = array_keys(array_merge($a,$b,$c,$d)); Foreach($keys as $key){ $sums[$key] = array_sum(array_column($arr, $key)); } Var_dump($sums);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array(5) { ["aa"]=> int(14) ["bb"]=> int(22) ["cc"]=> int(5) ["dd"]=> int(11) ["ee"]=> int(5) }
preferences:
130.32 ms | 408 KiB | 5 Q