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<?php function sum(int $a, int $b) { return $a + $b; } var_dump(sum(1, 2)); var_dump(sum(1.5, 2.5)); ?>
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
int(3) Deprecated: Implicit conversion from float 1.5 to int loses precision in /in/FD47k on line 3 Deprecated: Implicit conversion from float 2.5 to int loses precision in /in/FD47k on line 3 int(3)
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
int(3) int(3)
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Catchable fatal error: Argument 1 passed to sum() must be an instance of int, integer given, called in /in/FD47k on line 7 and defined in /in/FD47k on line 3
Process exited with code 255.

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