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<?php function sum(...$numbers) {    $acc = 0;    foreach ($numbers as $n) {        $acc += $n;    }    return $acc;}echo sum(1, 2, 3, 4);
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.4.32
Parse error: syntax error, unexpected '.', expecting ')' in /in/5WJf7 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '.', expecting ')' in /in/5WJf7 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/5WJf7 on line 3
Process exited with code 255.