PHPize Online / SQLize Online  /  SQLtest Online

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<?php $arr1 = [ 33 => [ 0 => 30319, 1 => 30318, 2 => 30315 ], 32 => [ 0 => 21300, 1 => 45988 ] ]; $arr2 = [ 33 => [ 0 => 50209, 1 => 50149 ], 34 => [ 0 => 12345, 1 => 34567 ] ]; $res = []; foreach(array_merge(array_keys($arr1), array_keys($arr2)) as $k) { $res[$k] = array_merge( $arr1[$k] ?? [], $arr2[$k] ?? [] ); } print_r($res);
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