3v4l.org

run code in 300+ PHP versions simultaneously
<?php function example(int|string $arg) : int|string { return $arg; } var_dump(example("foo")); var_dump(example(42));
Output for 8.0.1 - 8.0.20, 8.1.0 - 8.1.7
string(3) "foo" int(42)
Output for 7.4.0 - 7.4.30
Parse error: syntax error, unexpected '|', expecting variable (T_VARIABLE) in /in/Y5Vrb on line 3
Process exited with code 255.

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