3v4l.org

run code in 300+ PHP versions simultaneously
<?php /** * @param array<Exception> $input */ function takes(array $input): string|null { return $input[0]?->getMessage(); } takes([]);
Output for 8.0.1 - 8.0.26, 8.1.0 - 8.1.13
Warning: Undefined array key 0 in /in/1raa8 on line 8
Output for 7.4.0 - 7.4.33
Parse error: syntax error, unexpected '|', expecting '{' in /in/1raa8 on line 6
Process exited with code 255.

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