Online PHP editor | refs for sf1gE

<?php $arr1 = [1, 2, 3]; $arr2 = [2, 4, 1]; $arr1 += $arr2; print_r($arr1); $arr1 = ["foo", "bar", "baz"]; $arr2 = ["bar", "qux", "foo"]; $arr1 += $arr2; print_r($arr1); $arr1 = [1, 2, 3]; $arr2 = [2, 4, 1]; $arr1 = array_merge($arr1, $arr2); print_r($arr1); $arr1 = ["foo", "bar", "baz"]; $arr2 = ["bar", "qux", "foo"]; $arr1 = array_merge($arr1, $arr2); print_r($arr1); function returnArr($i) { return [ "foo". $i ]; } $arr = []; $arr1 = []; for ($i = 0; $i < 4; $i++) { $arr += returnArr($i); $arr1 = array_merge($arr1, returnArr($i)); } print_r($arr); print_r($arr1);