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run code in 300+ PHP versions simultaneously
<?php $input = Array( Array ( 0 => 1, 1 => 2, 2 => 3, 3 => 4 ), Array ( 0 => 2, 1 => "aaa" ) ); $result = call_user_func_array("array_merge", $input); var_export($result);

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44.42 ms | 402 KiB | 5 Q