PHPize Online / SQLize Online  /  SQLtest Online

<?php $m = [1 => 20, 30 => 40, 98 => 99]; $m1 = [1 => 5, 37 => 42, 70 => 79, 80 => 99]; $keys = array_keys($m); $keys1 = array_keys($m1); $values = array_values($m); $values1 = array_values($m1); $n = count($keys); $n1 = count($keys1); for($i=0; $i<max($n, $n1); $i++){ $key = (isset($keys[$i])) ? $keys[$i] : 100; $key1 = (isset($keys1[$i])) ? $keys1[$i] : 100; $value = (isset($values[$i])) ? $values[$i] : $values1[$i]; $value1 = (isset($values1[$i])) ? $values1[$i] : $values[$i]; $res[min($key, $key1)] = max($value, $value1); } print_r ($res);