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run code in 200+ php & hhvm versions
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<?php function sum(int $a, int $b) { return $a + $b; } var_dump(sum(1, 2)); ?>
based on CDWSG
Output for 7.0.0 - 7.2.0
int(3)
Output for 5.3.19 - 5.6.28
Catchable fatal error: Argument 1 passed to sum() must be an instance of int, integer given, called in /in/caeeI on line 9 and defined in /in/caeeI on line 5
Process exited with code 255.