3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr1 = [1, 2, 3]; $arr2 = [4, 5, 6]; $arr4 = [...$arr1, ...$arr2]; print_r($arr4);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 )
Output for 7.3.33
Parse error: syntax error, unexpected '...' (T_ELLIPSIS), expecting ']' in /in/ImrKA on line 5
Process exited with code 255.
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89.39 ms | 1250 KiB | 4 Q